Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baf73f04fcb3b49…

MALICIOUS

PDF

46.1 KB Created: 2020-08-05 17:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8d8e31547e020b6fd31624c6ccff4a SHA-1: 5aa30de05b9a37d2ac8494c74fba7448d8c3ea47 SHA-256: 2baf73f04fcb3b49b2ec5b8d0fd8c25d49662cd706e73f18076388e1e58ca32b
154 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body contains text related to 'Politik identitas dan multikulturalisme pdf' and is generated by wkhtmltopdf, suggesting a lure document designed to host a large number of outbound links for SEO manipulation or to redirect users 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=politik+identitas+dan+multikulturalisme+pdf
    • http://files.newsomecasting.co.uk/uploads/1/3/0/7/130739996/1510371.pdf
    • http://files.romancewaiheke.co.nz/uploads/1/3/1/4/131484133/4526697.pdf
    • http://files.petersenacpcourses.com/uploads/1/3/0/7/130775245/aee3c25.pdf
    • http://files.agrawpetfood.com/uploads/1/3/2/6/132695714/faxifigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4979/files/31142062203.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9006/files/6428958692.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/dakelegojobigedobaxavova.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/fogolokumidazitidanizow.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/zofamasilojab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/40698286888.pdf
    • https://cdn.shopify.com/s/files/1/0434/9824/2214/files/xolizowivelozumotuwagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/i_love_to_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/10324346394.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/35821136024.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/wanamisunut.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/15371461825.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_off00007843.bin
825fb13fdc4c4fe801fa4575f176eebc047d7b6b4188c82d5d266056cf365726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7843 5252 bytes
font_01_sfnt_off00008a07.bin
1ad67995bc2d3b8fa9fcb2512268d01562143a158c3e7dfa9129271e045d6441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A07 9736 bytes

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