Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe1129913a91327…

MALICIOUS

PDF

35.6 KB Created: 2020-08-11 22:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b82a0ec94d51dbf14fda42b17e3dc7b SHA-1: 120f1bb0babc1258ffe35a411b3440eba4d0957b SHA-256: abe1129913a913278c606608e5432083f426a051f1a74833b93ee92da9c9203d
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the string 'Cambridge pet 5 pdf' and the malicious URL, suggesting a lure to a potentially harmful site.

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=cambridge+pet+5+pdf
    • http://files.lukehuling.com/uploads/1/3/1/8/131858592/4338907.pdf
    • http://kubiwomid.partnersinprayerforourprodigals.com/uploads/1/3/2/8/132814930/715471.pdf
    • http://pakil.hylandgroup.com/uploads/1/3/1/0/131070374/mevimigoxamukon-ruvinoliz-zovarip.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/67334606806.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/mizorimalovubis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/71323434755.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/89201268643.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/sammamish_weather_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/active_and_passive_voice_worksheet_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/37757162724.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/ansible_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6985/8214/files/twinkle_twinkle_little_star_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/37455155511.pdf
    • https://cdn.shopify.com/s/files/1/0437/9115/5361/files/92927197065.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_off00004de5.bin
47e3669e3710d4a27e1f37af6d249dca5838dcd8ccfc4f0ca53be901d56bea6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE5 5320 bytes
font_01_sfnt_off00005fee.bin
8fbab7ac02ac73a7f3e220293ca0bfb00c16abaa8000702c234cd9e2222341ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEE 9888 bytes