Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a49b4f021d7a4db…

MALICIOUS

PDF

51.1 KB Created: 2020-08-09 03:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d58cf686faa36e388c744abb85072fba SHA-1: 69922297843d127fb6ae0415b8556d21a75965ee SHA-256: 3a49b4f021d7a4db099d64904c1b37962563bb4f6339fb28b45220e1d9ac8f5d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body also contains numerous links to external PDFs hosted on various domains, including Shopify, likely as part of a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a redirection-based attack.

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=abnormal+psychology+12th+edition+dsm+5+update+pdf
    • http://files.philologia178.org/uploads/1/3/2/3/132302759/disunobegotanelubo.pdf
    • http://jozodukob.fundingaction.com/uploads/1/3/1/6/131606349/vilumejokaf.pdf
    • http://niwimi.allsoulsharlesden.com/uploads/1/3/2/6/132681556/nojixuje_juzaxumi_wuferi_nibajedejalix.pdf
    • http://zuluke.blacksheepdivision.org/uploads/1/3/0/7/130776483/dafabobizibivo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/rowav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/57726355247.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/xutepisuxajodonavak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/staight_outta_cashville.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/nujipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/basic_c_programs_for_practice.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/vidumeperelupesat.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0413/files/arnold_schwarzenegger_modern_bodybuilding_encyclopedia.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/69933119448.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/wanetowosiwinobejirelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/chuyn_file_sang_ppt_b_li_font.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/zajoporosiloregukinugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/sotal.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_off0000772f.bin
eb4dbbfbba6284de6f47b7032599f8e06924c2d2b791b639c87ea5c6870f64eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772F 5988 bytes
font_01_sfnt_off00008b65.bin
12fbe83e0d204a7b680c9b3c1bb6131dcbb37eb4aeaeeb18f91b2d2baf4a2b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B65 11164 bytes
font_02_sfnt_off0000b0bb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BB 4324 bytes

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