Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e858201bb9b65a3…

MALICIOUS

PDF

38.9 KB Created: 2020-08-20 09:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d0462b76615f2fbb235be47e06f6a2c SHA-1: 0bf9bc400a31b850556c0b9d4d3c270e5d4a5fc9 SHA-256: 1e858201bb9b65a3db5fe4c1730f0d5f28880105af576437c8f9983c3f2e7eb0
202 Risk Score

Malware Insights

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

The PDF file contains a lure for homework answers, which is a common social engineering tactic. It embeds numerous links, with one specifically identified as a malicious redirector: https://ttraff.com/pify?keyword=homework%2523+2+economics+e+napp+answers. This redirector likely leads to a malicious payload or phishing page. The presence of multiple Shopify links suggests an attempt to blend in with legitimate content while distributing the malicious link.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=homework%2523+2+economics+e+napp+answers In PDF document text
    • http://files.thegutguys.com/uploads/1/3/1/3/131379353/kubotavo.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/1/0431/7075/8820/files/ib_biology_biozone_workbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/rapumibimidexezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/16948328416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1811/5480/files/ritusuvijasagigujisiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1288/1564/files/30934244887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/8047292994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/tirorifutukonowasegiwajaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/26727509844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/kejebikuwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4587/8941/files/puwoxeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/wamiwazawuwejusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/2931617258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/73150385617.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_off00004f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9D 4076 bytes
SHA-256: ea384a61ba26ade55a1fcee9c465e8fbc447ece8ede6181c788c6d972b4fa466
font_01_sfnt_off00005d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5A 10168 bytes
SHA-256: b2352795bdd3dc3e76d68a2e92bcf1f48c3fa78e927980f453d6275bd73a4390
font_02_sfnt_off00007ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3