Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad9104d0ca4d477…

MALICIOUS

PDF

51.1 KB Created: 2020-08-22 08:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d775276bb0d3064950fcb68cd667770 SHA-1: e9b88b88351c9a19d2c7d05a3bfd0679dc781e78 SHA-256: cad9104d0ca4d477e2362c6dd4f1af459529e6d62651e1f6af8d5e084785ba11
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a guide for managing Android photos. The PDF also features a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier 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=cancellare+foto+da+galleria+android
    • http://files.atssbregion8.org/uploads/1/3/1/0/131071167/6944884.pdf
    • http://jivexax.wcaathletics.com/uploads/1/3/2/3/132303382/bufaponexexutef.pdf
    • http://punipo.rememberingresistance.com/uploads/1/3/0/7/130775934/7488350.pdf
    • http://files.newbodyforu.com/uploads/1/3/1/6/131637553/vidirim.pdf
    • http://files.chinesearts-oly.com/uploads/1/3/1/4/131407944/527fce756.pdf
    • http://jivexax.wcaathletics.com/uploads/1/3/2
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/39716890676.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/vubadexutuxedoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/online_java_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0436/1404/4323/files/shot_by_shot.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2240/files/kofudekojolis.pdf
    • https://cdn.shopify.com/s/files/1/0437/3531/8689/files/70095617340.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/rujabasabofuzilefezuvu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5426/6533/files/88873432771.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/before_you_quit_your_job_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/49043674827.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/10540327890.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_off000074df.bin
10b8eb0dae2928200458a317323970bf511291ec7138b3dd75e77be6460b3fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DF 4916 bytes
font_01_sfnt_off000085a3.bin
0a950080788708927dad95d2d98875224c9a4c6978ab56e67778d51399641cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A3 11148 bytes
font_02_sfnt_off0000aa16.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA16 16060 bytes

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