Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a2564fb4950c05…

MALICIOUS

PDF

86.5 KB Created: 2020-08-01 09:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 289ce26259e9e866d72bb6a748a9d8a0 SHA-1: c83ecb1f068e5551f16a4a37146a83e97f74836a SHA-256: a2a2564fb4950c053913ae902ea62aef3064c1d2d89e2e555577be1dea7af288
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a 'Thomas calculus 12th edition solution manual'. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this redirection to known malicious infrastructure. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates malicious intent. The document body, though heavily obfuscated, contains the same lure text and the malicious URL.

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=thomas+calculus+12th+edition+solution+manual In PDF document text
    • http://files.friendsofmarplestation.co.uk/uploads/1/3/0/8/130814205/kugugutulapuwejase.pdfIn PDF document text
    • http://files.forgedtecholsters.com/uploads/1/3/1/4/131437225/fedepidun.pdfIn PDF document text
    • http://files.lucypetersonwatkins.com/uploads/1/3/0/8/130874329/fd4c5.pdfIn PDF document text
    • http://files.nowwhatmemphis.com/uploads/1/3/0/9/130969075/lesezefesaku_jolimeto.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/1/0428/4815/7859/files/toxiwovulefoxuvurirazedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5803/6889/files/xanumepudizimamejatap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/4441677490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/refiwemezumesakebawajogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/32512323185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/lovefesevezadojizamumidox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3105/1943/files/1994_ford_taurus_sho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/58474791589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/lijuseforinivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/kugesikaris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/64935033819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/19115444543.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 6

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_off000100db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 5216 bytes
SHA-256: bafa6e997f15452f714ecbb550b1de192ae0cce86a06a4816b5fa49cf2da8bf1
font_01_sfnt_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 19392 bytes
SHA-256: 374778bfab62c750e4bbebf69c3538a2ce86612db03fda8f625512f55eeb8fcf

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