Malicious PDF — malware analysis report

Static analysis result for SHA-256 82c576bc1c1f0594…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 07:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66550782559876549f99781aa9bc969b SHA-1: 70c9436f002f875cfb9118b2990ff4ff3807d996 SHA-256: 82c576bc1c1f0594a408e829b60c43f5ce374293044ddbf5aac3133b87264e1e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.com/pify?keyword=learning+php+the+hard+way`. The document body, though heavily obfuscated, also contains this URL and references to other PDFs, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness, and the presence of a redirector link aligns with common phishing and malware distribution tactics.

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.com/pify?keyword=learning+php+the+hard+way In PDF document text
    • http://files.vanessamulton.com/uploads/1/3/1/4/131438240/9d9c0b3bf7.pdfIn PDF document text
    • http://files.tremaynesolar.com/uploads/1/3/1/6/131606965/zerapev-kobulotabov-tufeduvuj-gufajimejaji.pdfIn PDF document text
    • http://files.mineralhillsworkshop.com/uploads/1/3/1/4/131437299/f3656b1c2.pdfIn PDF document text
    • http://files.golifeunknown.com/uploads/1/3/0/7/130739508/e65582e.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/1/0433/8630/6710/files/52096646673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/dewizodoborezuresulalowov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1691/2023/files/41797472370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/71338372260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/suxepapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/420841164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/zulixidiferezuguranelul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4772/6753/files/nasm_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/somibosoxig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/82518855028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/55137673151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/26231112460.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_off000060de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 4824 bytes
SHA-256: 5094a99311c3ceb100d1fda2e8671d2d305ab62725728b010a4a3cdfd857a167
font_01_sfnt_off0000714a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 12432 bytes
SHA-256: 2ac461cd225779e5b5e05c57b800ce046b352b58a82987c68e0e0529e7aa53ae
font_02_sfnt_off00009a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A77 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f