Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0189e453133a584…

MALICIOUS

PDF

37.9 KB Created: 2020-08-14 07:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7fba6177666504aaa801fcb2fc4a0d4 SHA-1: 6e8f3aa824cfb3eb6e3f4c752a622c9914820703 SHA-256: f0189e453133a584d2b153b16ea446a03eaa054d9e779ca7fc939e58ce086162
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains numerous embedded links. One critical heuristic indicates the presence of a malicious redirector link, and another identifies a large external PDF link farm. The document body contains text related to 'Gattu battu song mp4' and appears to be generated by wkhtmltopdf, suggesting a lure or content stuffing technique. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content.

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=gattu+battu+song++mp4
    • http://kemaw.enduringpress.com/uploads/1/3/1/6/131637136/lowokurebafazul-tegaligi-vuvovodox.pdf
    • http://files.drkatiebrussard.com/uploads/1/3/1/4/131437987/629cf25379.pdf
    • http://files.laughinggoatfarm.com/uploads/1/3/1/4/131405958/fadedabe.pdf
    • http://files.energysmartacademy.com/uploads/1/3/1/6/131606060/d656e6.pdf
    • http://files.faithlutheranlr.org/uploads/1/3/2/7/132740275/repumixeguxogupuvuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/kukav.pdf
    • https://cdn.shopify.com/s/files/1/0440/8823/0053/files/amtrak_schedules.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0432/0267/4845/files/1548662765.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/date_plus_days.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/bixovekimogofijowakor.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/78145383103.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/pdf_antenna_theory.pdf
    • https://cdn.shopify.com/s/files/1/0438/2602/0509/files/netuzawemimakadojirifod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8661/files/tuvubadovivovop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/4039805089.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_off00005711.bin
44279f4c8c3af0b513a4b2c0e355f29aa213a12166d77ae77bd124e0993716ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5711 5268 bytes
font_01_sfnt_off000068f4.bin
90fe73c1c2ae19c37688055a04b7889d34b56892973191b0fda41e089d9c076c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 9948 bytes

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