Malicious PDF — malware analysis report

Static analysis result for SHA-256 006f56c2a5885c17…

MALICIOUS

PDF

56.7 KB Created: 2020-08-04 10:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e955bd8283a54f5d0415b17e33299e7 SHA-1: d787d371ce058fdf62aaa70402e781cdc49fe64f SHA-256: 006f56c2a5885c17a257e5942abbced7ebed60366272101f98462f1d94649f8e
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=algebra+2+saxon+math+pdf', which is likely intended to trick users into clicking through to a malicious site. 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=algebra+2+saxon+math+pdf
    • http://files.hwcroquetclub.com/uploads/1/3/0/8/130874324/b3ef6f95883211.pdf
    • http://files.crcandc.com/uploads/1/3/1/4/131484328/pivofod_fadudumovaf.pdf
    • http://files.andreavytlacilova.com/uploads/1/3/0/7/130738918/fubosager.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8982/0838/files/xbox_one_gta_5_dns_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4076/files/xabitadifife.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/rizalilalozup.pdf
    • https://cdn.shopify.com/s/files/1/0436/8757/5705/files/94557791409.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/9943192650.pdf
    • https://cdn.shopify.com/s/files/1/0450/9827/0885/files/two_weeks_in_hell.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/xugidusinixatepe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4884/files/76060164287.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/13226157456.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000948f.bin
875dcedb850bb06ce265e695ccdb6d1be2db34d854b19ff3a488f181f0c9602b
pdf-font-stream PDF embedded font (sfnt) at offset 0x948F 5784 bytes
font_01_sfnt_off0000a81f.bin
3411058c5f6aebdada2e4c44ea6a548953ec3e783b0467aa23a9982438727cd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA81F 14268 bytes