Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e8f9fed6ba856…

MALICIOUS

PDF

38.8 KB Created: 2020-08-14 21:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d573fc6fcab746156876503acac61b6 SHA-1: d6bf09f16ff8f87fc6771c3586877040118fdf6e SHA-256: 991e8f9fed6ba8563a96931564700fc2b891545936f4f62dd55c47111fedd948
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=data+entry+sheet+in+excel+2007', suggesting a lure to trick users into clicking. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, which are likely part of a link farm to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=data+entry+sheet+in+excel+2007 In PDF document text
    • http://files.enghowe.com/uploads/1/3/2/6/132680905/kuxenovo-rasotojigafirab-zovutum-bopuduk.pdfIn PDF document text
    • http://kideleg.smsyates.com/uploads/1/3/1/8/131856318/743d94d8950.pdfIn PDF document text
    • http://files.illustrationpad.com/uploads/1/3/0/7/130775583/60d2ba971a953.pdfIn PDF document text
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.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/1/0431/6643/3435/files/50219521208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/avast_antivirus_license_key_free_2038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/vejimapotire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/36183428355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/c_udp_socket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/butosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/arelik_klima_arza_kodlar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/68492375523.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A38 5408 bytes
SHA-256: a9baaa25df77bffdf23b61dd6902daa819ceae9856f026cb2534ed6cafa283c9
font_01_sfnt_off00006ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA6 9932 bytes
SHA-256: c982fcaf74543b2041cc8288c2b24ba13abb99f8e5d46a0c2c93f0a1f700f7c3

Open this report in the interactive analyzer, or submit your own file for analysis.