Malicious PDF — malware analysis report

Static analysis result for SHA-256 234b4277e59dc06a…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 21:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b27f4d0ce71983b8b83b043b518c01 SHA-1: 1abb01ecd0c3f5ba9864b352fadd0e8c0219ebf1 SHA-256: 234b4277e59dc06ae7ea528a775588b0e5985d7059bcbadae969fda9696bf240
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a reference to 'Abzu achievements guide', suggesting a lure. The PDF also contains a large number of external links, many pointing to Shopify domains, indicating a link farm strategy. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=abzu+achievements+guide
    • http://files.folkloreandfern.com/uploads/1/3/1/0/131070202/botemokisekep-gesumajumigiw-meteziwe-dewija.pdf
    • http://lameri.coloradojuniorcup.com/uploads/1/3/1/3/131398020/5630178.pdf
    • http://files.kasakesari.com/uploads/1/3/0/7/130739143/8366599.pdf
    • http://wipofib.beulahjoy.com/uploads/1/3/0/7/130738837/wakufuluxidesa-kudonin-gunun.pdf
    • http://xoxumig.inaheadofthecurve.com/uploads/1/3/1/0/131070382/a6727ca370f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/41346771502.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/12492731912.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/dynamic_bones_unity.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/asientos_de_diario_ejemplos_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/cutting_edge_advanced_teacher_s_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/79388871695.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/93039938178.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/binibototal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/kugete.pdf
    • https://cdn.shopify.com/s/files/1/0431/5349/0074/files/ignition_timing_advance.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/chevy_malibu_2017_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/1433867954.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e31.bin
450e23c96daf601253b79f36b2bf1629c5d7f689a7e2115bc4ddfc276af86c2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E31 5464 bytes
font_01_sfnt_off000060af.bin
43f444fbe408f8a0eb4ae939792454961344e41741d2f909aaa391b7991bcb8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 9864 bytes