Malicious PDF — malware analysis report

Static analysis result for SHA-256 058f13ef7e6e4627…

MALICIOUS

PDF

50.1 KB Created: 2020-08-01 12:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e347c3f2f6a5fef2d892b6d902cd202 SHA-1: 3326f935c99536c65807c8b4be15cb4620df58bd SHA-256: 058f13ef7e6e46271ed1a50d8ff3199aaa8acf94e9c1365f2205cb015293a65f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. The primary malicious indicator is the redirector URL, https://ttraff.com/pify?keyword=autobiography+of+a+yogi+pdf, which is known to lead to malicious infrastructure. The document body, though heavily obfuscated, contains this URL and other Shopify links, reinforcing the lure of a PDF download.

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=autobiography+of+a+yogi+pdf
    • http://files.yliniemi.com/uploads/1/3/0/8/130813841/kofagotax.pdf
    • http://files.rootsandwingscommunityschool.org/uploads/1/3/0/9/130969148/3746830.pdf
    • http://files.globalcompassionday.com/uploads/1/3/2/6/132696598/divavuwu.pdf
    • http://files.artwithmrssouth.com/uploads/1/3/0/8/130813531/xusuvomi-pojaruxopefi-pikamage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/62231437277.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2635/files/miwanufusuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/69195623992.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/defibifeponasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/12594799129.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/nebidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1678/files/zeteju.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/mivilugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/luxitoduxekavorel.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/dalefefebeno.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/61606615543.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_off000086a7.bin
6b015eb0be84272a44f2c3d338573c4e7360040825bab871f74893170dabd2ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 5324 bytes
font_01_sfnt_off000098c9.bin
4ece00e365441eac520d072ed106c01454c585642df187b65adf24e82f216c37
pdf-font-stream PDF embedded font (sfnt) at offset 0x98C9 10232 bytes