Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a12e5032fd85670…

MALICIOUS

PDF

48.8 KB Created: 2020-08-14 09:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6a6ae2b3bb2d1ae65304550ef5bda95 SHA-1: cb80d6792e9320a3838f93b7c1a9c63d23dead20 SHA-256: 8a12e5032fd85670784a9715cc07062e1ea942e79f9e9517d16807e0564c62cd
154 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=lagu+batak+toba+lama, which is likely used to redirect users 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=lagu+batak+toba+lama
    • http://rolune.jesuschannel.com/uploads/1/3/1/6/131606218/pevekaligud.pdf
    • http://files.hearttoheartpgh.com/uploads/1/3/1/0/131070452/burubogagipug.pdf
    • http://nolixu.ontariodelivery.com/uploads/1/3/1/6/131606289/felapixofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/wolofamesivuxeta.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/bilderberg_group_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/e_500_2004_chiltons_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/5841451050.pdf
    • https://cdn.shopify.com/s/files/1/0430/7976/2073/files/pubg_lite_us.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/tefokorotuduba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/55730156876.pdf
    • https://cdn.shopify.com/s/files/1/0439/4899/8811/files/bloodborne_undead_giant.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/general_awareness_for_aso_exam.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/fivutowetanuniniragazapir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0095/4021/files/gakukupemobadadunavod.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/arteritis_temporalis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/77489839962.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_off00007102.bin
96229752af1d76c848061500e19fb3e9fc992561e5c451eefcb1451ca59311d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7102 4876 bytes
font_01_sfnt_off0000818d.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 1800 bytes
font_02_sfnt_off00008a1b.bin
04aa436be28f4834bbae402524e2dc209251c3243e3acddd1992dfa72a67594a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1B 14268 bytes

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