Malicious PDF — malware analysis report

Static analysis result for SHA-256 f185801004dcd60d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 17:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3f29c24be2263837e2af6ddba6982c3 SHA-1: 543e39a82039ca878702cc3ae00693a0f2f49603 SHA-256: f185801004dcd60d9f22306b3ee21e4f3925ad8adc9bfa7fa7cc327c5c2bf576
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to distribute traffic or obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, which could lead to malware downloads or phishing sites.

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.ru/pify?keyword=ukulele+music+sheets+blank
    • http://files.mrbrushgrade5.ca/uploads/1/3/0/7/130740205/mipusogud.pdf
    • http://files.jelatreasures.com/uploads/1/3/1/6/131606231/be859326.pdf
    • http://files.ronukrainetz.com/uploads/1/3/1/6/131607075/jibumujepafufewupov.pdf
    • http://sunifabal.nickdolanmusic.com/uploads/1/3/0/7/130738850/rinedixaf-nujasozareraz-buwutujif.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/ladofuvefaxomananajov.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/building_rapport_with_clients.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/67148414665.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/bevesem.pdf
    • https://cdn.shopify.com/s/files/1/0451/4267/1513/files/bts_fake_love_billboard_music_awards_performance.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3816/files/13162111581.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/58480834506.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7032/files/fozanumile.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/mopadanizaxubisenuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/17581947186.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/
    • https://cdn.shopify.com/s

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f29.bin
ba691a2cce92b5bd5cfdc9236b1f4c78976e179818c59281a64925a8e9204e93
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F29 4912 bytes
font_01_sfnt_off00005fb9.bin
f0028c76bea591c9ead7f9bfabd36fd5f677a5b93f88ac40a1e45adc7631659f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 13764 bytes
font_02_sfnt_off00008b63.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B63 4324 bytes