Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a77d81bad63ebbc…

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 16:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f35ce6412d0c5758c951db1e82de6118 SHA-1: 777be0b8e34727d17538f7c046b6b4d908edf67e SHA-256: 7a77d81bad63ebbc28cfa0ccbf052ffa8242928ac61f128f538372af84a36aba
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, many of which point to redirectors and potentially malicious infrastructure. The primary lure appears to be a 'nutrition guide' that redirects to `https://ttraff.com/pify?keyword=cookout+restaurant+nutrition+guide`, which is flagged as a malicious redirector. The document also contains algorithmically generated URLs, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cookout+restaurant+nutrition+guide In PDF document text
    • http://dimema.terahlynn.com/uploads/1/3/0/8/130874431/zanawegaraxan.pdfIn PDF document text
    • http://puxexu.cameratakilkenny.com/uploads/1/3/1/0/131071252/pezijo_norasinefor.pdfIn PDF document text
    • http://rarijol.brucereevesswiftamericasartist.com/uploads/1/3/1/3/131383657/jelizedilelez-tisowe-gebanimarukiri-pukime.pdfIn PDF document text
    • http://lajav.stephaniecpassman.com/uploads/1/3/1/4/131453177/2583864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/28468909751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9768/5157/files/8528093321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/bajavavivubefopimawitotuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/54064488579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7303/4658/files/jovofuzozomijesobisuzemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/97444154336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2067/files/69510139056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8289/8839/files/rational_numbers_class_8_worksheet_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/854548998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6959/1967/files/10137063638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/1638615557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/55009583007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4382/3517/files/77090375750.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F5 4928 bytes
SHA-256: 4d7562ddadc848760bf651a8120367ee3c4f3e0f383077d3abf2e18a8889c51a
font_01_sfnt_off000065cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 14940 bytes
SHA-256: 282fdb69fe6081213a047edaf09bd1918adf80cdfa9defa4ef171396beff1143