Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad271c878b4fa773…

MALICIOUS

PDF

40.1 KB Created: 2020-08-14 17:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c8596fdc31aff925ef839976d859656 SHA-1: fe37e087a05a11d7c41872aea3f4862782ba2556 SHA-256: ad271c878b4fa7739e03b1dc336378717e6cdda0150b551e811cde3d35c96c95
202 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566.002 Phishing: Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=internet+explorer+apk++for+android+phone'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further suggests a social engineering lure to trick users into clicking the link, likely to download malware or be phished. The document body contains the malicious URL, reinforcing the attack pattern.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=internet+explorer+apk++for+android+phone In PDF document text
    • http://files.joneslawofficeottawa.com/uploads/1/3/1/4/131406478/bajupenojit.pdfIn PDF document text
    • http://wadev.allsortspreschool.com/uploads/1/3/0/9/130969754/e57a28c028183b6.pdfIn PDF document text
    • http://files.tenwebtv.com/uploads/1/3/1/0/131069899/6ec828f1ca7121.pdfIn PDF document text
    • http://files.myargosy.com/uploads/1/3/0/8/130874520/77933.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/1/0431/1564/3041/files/guwaxofikijowowizunutoxiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/pijivepisajop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/44829787594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/rules_of_evidence_in_international_arbitration_an_annotated_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/93823750858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/bioreactor_design_and_operation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/kamok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/71379276326.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 5

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_off00005f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 5020 bytes
SHA-256: e6a1b0eea018b404b5e76340e1f4aafc7b58907660bf5dc157369c4b7ce6cd8f
font_01_sfnt_off00007051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7051 10384 bytes
SHA-256: a222bd69f262f16dfe18bc3a5e4cab2c31f28b5cf14cb651c39343b0c1b9dd2f

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