Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cb2af0ae824b34…

MALICIOUS

PDF

46.5 KB Created: 2020-08-26 20:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb176a57222b1321acfc16dd807cd401 SHA-1: 72c1f482ba2c06110cf15eb64cc87e64eb1c3db3 SHA-256: 43cb2af0ae824b3497d3abf32bf20ccd7dd2fd65f18c31040d24108fdfad7607
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is presented as an 'after school tutoring curriculum'. The document also functions as a link farm, pointing to numerous PDFs hosted on Shopify. The presence of a visible LOLBin command execution instruction suggests potential for further malicious activity, likely involving the redirection to the malicious URL. The primary intent appears to be directing the user to the malicious ttraff.com domain.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=after+school+tutoring+curriculum In PDF document text
    • http://kodat.whcffm.com/uploads/1/3/0/9/130969186/dilolewelok.pdfIn PDF document text
    • http://gikebe.woolydogdown.com/uploads/1/3/2/6/132680813/jobales.pdfIn PDF document text
    • http://files.cmdg.online/uploads/1/3/1/4/131437087/rovikowoburerim.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/1/0433/6893/9672/files/keranejunezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/21507361669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/zivizolerizuxoroxepiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/stardew_valley_fishing_guide_by_season.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/darujodubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/gilami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/wafavapej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/30599760735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/benim_hocam_tarih_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/neumonia_en_bovinos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 5076 bytes
SHA-256: 699f179cd9434ebc3a12abefd164736849a8d3cae539977961a90552af5ec613
font_01_sfnt_off00008906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8906 10668 bytes
SHA-256: 9761b25e34b8e20f2997f0a0bd4f01f1816dd118685a4f76a280deec485f74e5