Malicious PDF — malware analysis report

Static analysis result for SHA-256 a106131070eb6f78…

MALICIOUS

PDF

39.8 KB Created: 2020-08-09 01:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9622e31f36a4289a385ebe6cc35e16a SHA-1: c8299cd9e798d4b3151368cb0e50ade510369a3d SHA-256: a106131070eb6f78384fa0bbe55c739811cb6a9677c2bfe41f594444efbe72dd
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to various PDF files, many of which are hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=auto+ingles+total+pdf', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking these links, potentially leading them to malicious websites or initiating downloads. The ML classifier also strongly indicated maliciousness.

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=auto+ingles+total+pdf
    • http://kororus.thelauramagner.com/uploads/1/3/0/7/130738720/gasonizizare_pitejudasopuk.pdf
    • http://povarax.myeffectivo.com/uploads/1/3/1/4/131482962/likaxazileva.pdf
    • http://xusupasu.robkodama.com/uploads/1/3/2/7/132710592/kapefez-noloxedamu-lepadumu.pdf
    • http://files.dwarfhollowfarmstead.com/uploads/1/3/1/3/131379510/wemizibesiwivezik.pdf
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/joindre_deux_fichiers_en_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0429/5131/1513/files/12213011413.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/smashbros_title_id.pdf
    • https://cdn.shopify.com/s/files/1/0432/5087/6578/files/adultery_in_the_bible.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/mofofakovuzizenifas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kirojaj.pdf
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/basale_stimulation_in_der_pflege_die_grundlagen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/random_string_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/4257164923.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/8724/1119/files/revabem.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/xerizopaje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c6.bin
ff99af9e227b5475e806b397b526e5f49e23cb6c2c55daf97f8172d8755c61af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C6 4984 bytes
font_01_sfnt_off000062d1.bin
b09866f03580174971dd905632e3abc8d787027c06d67d51e6bfecece0a4e857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 9948 bytes
font_02_sfnt_off00008486.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8486 4324 bytes

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