Malicious PDF — malware analysis report

Static analysis result for SHA-256 3336dfdea765b806…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 19:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6527c1d427d4b6fe071da1b18583a83 SHA-1: bb74a079a1291a27c621c043d3678a0845c8bc93 SHA-256: 3336dfdea765b806169a0eaedaa5122132737748e0590641ad0187e499d452f5
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=programa+para+unir+pdf+softonic`. The document body and embedded artifacts suggest a lure related to PDF utilities, with a call-to-action phrase likely intended to trick users into clicking the malicious link. The presence of a large number of external PDF links further supports a link farm or redirection tactic.

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=programa+para+unir+pdf+softonic In PDF document text
    • http://files.cutofnova.org/uploads/1/3/1/3/131379761/xegukuwusak_fepivavamere_wasajisive.pdfIn PDF document text
    • http://files.jacksongirlssoccer.com/uploads/1/3/0/9/130969080/befeadd.pdfIn PDF document text
    • http://files.thekesine.com/uploads/1/3/0/8/130815277/7f9900373d6.pdfIn PDF document text
    • http://files.bloorstreetsound.com/uploads/1/3/0/8/130814290/242bb.pdfIn PDF document text
    • http://files.hutchbooks.com/uploads/1/3/1/4/131406841/cb37b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/lomewagulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/rilapuzemoxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/78328737907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/rezejoloparuvevozamapik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/vatisunotopunafaganiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7845/8275/files/loladutazanirafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/zepaxurelid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99744184538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/mass_effect_andromeda_suvi_romance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/learn_applescript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77439678162.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1A 5208 bytes
SHA-256: a03c39ca20e6703ed41cdf1c2e71dee70c53793a97d5b81e1f4d9908ab3b8ef5
font_01_sfnt_off000070ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AB 10140 bytes
SHA-256: c8f0fc368d1f54ae9879f9c68ec3e428b515c6eb7dd544694c187b6faff81244
font_02_sfnt_off0000936c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c