Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ca8f6d214bad9a…

MALICIOUS

PDF

72.6 KB Created: 2020-08-05 18:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce6cc0af69631d1eeaf310776471c132 SHA-1: 9f565228d3dfd6bb1c14752a95536c91af613c86 SHA-256: 53ca8f6d214bad9a440694e98adc9aabf694e3374714b0b44fa2e9276e12266f
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service identified as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into downloading content. The ML classifier also strongly indicated maliciousness.

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=surat+al+waqiah+arab+latin+dan+terjemahannya+pdf In PDF document text
    • http://files.texasyouthjumpstart.com/uploads/1/3/1/4/131438211/laminozufaxel.pdfIn PDF document text
    • http://files.brandsafarihunt.com/uploads/1/3/1/4/131410479/kabotex_pobek_revizufawixil_refanowoxijemid.pdfIn PDF document text
    • http://files.snugpubcocoavillage.com/uploads/1/3/1/0/131070849/911995dd952f90.pdfIn PDF document text
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.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/1/0436/0113/3731/files/28758796862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9200/8357/files/zuzejuxefirujomifawem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/gokojavevukevufowoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/aladdin_jr_musical_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1113/5894/files/genetic_causes_of_depression.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/ralagaduposubiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1895/9523/files/83560724775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/linin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/27125370943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/81242275125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/ford_crown_victoria_repair_manual_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/48751573346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/pupusoriponolaziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/gikasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/smiley_face_svg.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000da8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDA8E 31500 bytes
SHA-256: 92d049180da2b1541bb865c1784a20c9f0ec47ac88bcac67cbbdeb372d8ae6ba
font_00_sfnt_off0000a221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA221 5740 bytes
SHA-256: 7edcc663bd5291699048fd87ff295dc4444aedd171a920df20d3a22a74b6653e
font_01_sfnt_off0000b58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58C 11964 bytes
SHA-256: 0d2c0f8eb578e6191d0e57cfb17c5ae56c8758de78573edcef860123be3e6bb9