Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd48e251ff28add…

MALICIOUS

PDF

40.4 KB Created: 2020-08-10 22:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f3c89ea3a909a6e51b8b2dffafdeef SHA-1: 95cee4ed74971ce70c6bf29adbe65d802a0fb890 SHA-256: 1bd48e251ff28add87a122aac8c1d5f57007aede7226303d455598cccaa58ac8
152 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, reinforcing the lure to external content. No scripts were extracted, but the primary attack pattern involves directing users to malicious infrastructure via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=argumenta%25C3%25A7%25C3%25A3o+logica+pdf
    • http://files.saraswatiadornments.com/uploads/1/3/1/3/131380850/8aff36fb.pdf
    • http://files.smsphonefix.com/uploads/1/3/1/6/131606208/c636cc0825a.pdf
    • http://jasuvip.softwareselection.net/uploads/1/3/1/6/131607062/559079.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/zelep.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2284/files/alagappan_medicine_5th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/0296/5665/files/los_pensadores_daniel_boorstin.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/makalah_konsep_dasar_akuntansi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/10567161119.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezaneseku.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/xubezerijilav.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/samples_of_business_plans_for_small_businesses.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/6602977872.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4198/files/gegutikezotetelaxoli.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/boximifev.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0241/files/49912227417.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b6e.bin
29de3bc5a423a5b6ee5bbb25c2d084e68df253ed1c43b707870610a26b68f6bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6E 5784 bytes
font_01_sfnt_off00006e20.bin
17952ddaf5e3087086308f97b6d239ef1f74dce6bc7819f04269250f92eac8ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 12348 bytes

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