Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c7f2c670d8b32d…

MALICIOUS

PDF

56.2 KB Created: 2020-08-08 10:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4428026d7546b9c0b6f34793306745e0 SHA-1: 22721b53c6bf1cf940543e7f769d2635c5cfc953 SHA-256: 11c7f2c670d8b32d436fa741d325979d5603491b5d614632277a6a41b51b77e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, indicating an attempt to direct users to malicious content under the guise of research material.

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.cc/pify?keyword=research+on+social+media+marketing+pdf
    • http://files.julieswientypianostudio.com/uploads/1/3/0/7/130738928/vefajamapawalufew.pdf
    • http://bowum.kgsstone.co.uk/uploads/1/3/1/4/131406082/4315118.pdf
    • http://pejix.lhccd.net/uploads/1/3/0/7/130739590/3640408.pdf
    • http://soxajakom.theairconsulting.com/uploads/1/3/1/3/131380480/gurak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/lirupura.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/kurikisipitisiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/94189389383.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/gemojegemopejotetuwijet.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/973561160.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/dogilemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0524/6631/files/lupedopixopetugamatike.pdf
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/92702258159.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/mubaponajafofogategu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/xakesusoterewerojuwoku.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/todiwij.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/boss_gt_10_patches.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/201648558.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f56.bin
67cf29d4d10f979a76d23f6740a1198c107ff0a39059168606d957d6f54ccee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F56 5428 bytes
font_01_sfnt_off0000a19b.bin
682561eb307dc0f841120730531dc14c11c5eec833e9daaa17272b0f1b167a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA19B 10424 bytes
font_02_sfnt_off0000c540.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC540 4324 bytes

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