Malicious PDF — malware analysis report

Static analysis result for SHA-256 024008d85329bfe5…

MALICIOUS

PDF

33.9 KB Created: 2020-08-23 22:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3687a9ec95f14a6b0f0b831f3db1836d SHA-1: 7af03c25d115f4f432568342c25abc3b188ea18e SHA-256: 024008d85329bfe58e71038a11f577be65039f4d9db605689e3bf4e80e72881d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as 'Bala bala song 320kbps' which redirects to a malicious URL (ttraff.com). This URL is identified as a malicious redirector, and the PDF itself is flagged for containing a large number of external links, suggesting a link farm or SEO abuse tactic. The ML classifier also strongly indicated maliciousness. The primary intent appears to be directing the user to a malicious site, likely for phishing or to download further malware.

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=bala+bala+song++320kbps
    • http://files.fullcirclearts.org/uploads/1/3/1/6/131607075/memiwinozat.pdf
    • http://files.ravishedbyhisbeauty.com/uploads/1/3/0/8/130814017/6b2fd92672e7.pdf
    • http://komusod.janesgabin.com/uploads/1/3/0/9/130969873/livozurirokokupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6727/5424/files/vutujabegidigebef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/jababezusogavoleli.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/phr_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/5462/0059/files/mcmurry_organic_chemistry_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/15838732249.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/90039433731.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/wemesirafetupani.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/39125179569.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/75194912368.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/associative_property_of_multiplication_worksheets_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/23394950229.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004594.bin
464e52e3d38b3bdd82bc0b2a44ed8d0c3d25d9e3e5ec390eb0fbcef44dcc40e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4594 5584 bytes
font_01_sfnt_off000058a1.bin
5df9d0b4ee018778be7445199d9c7eb89f76ccf4a445f6b4fd4cab84c6883e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A1 10088 bytes

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