Malicious PDF — malware analysis report

Static analysis result for SHA-256 3028dce9f255c25a…

MALICIOUS

PDF

40.0 KB Created: 2020-08-04 05:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34fc43b425026351356e758cac26399d SHA-1: 8340dc99b4a1a826c62b0f18411051e1493f1fa3 SHA-256: 3028dce9f255c25a013244fc0faa35df051a61bbd1e40f5f6f9ec43985e8f3b8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and extracted URLs suggest a lure to download content, specifically mentioning 'burmese days pdf free download'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. No scripts were extracted from this sample.

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=burmese+days+pdf+free+download
    • http://files.ashiharakaratesg.com/uploads/1/3/1/0/131069819/lenazel.pdf
    • http://files.efrwildlandfire.info/uploads/1/3/2/8/132815015/4548689.pdf
    • http://files.livelifeunbroken.com/uploads/1/3/1/4/131437924/848e1e130b6.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8269/files/pirod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/jarabodi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/download_caballo_de_troya_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/veterinary_infectious_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/bomobigatonebuwibuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9206/6975/files/14354022251.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/mr_boombastic_mr_fantastic.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/62463778959.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/risk_assessment_table.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1699/files/hornady_7th_edition_reloading_manual.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_off000051a5.bin
58a915660885373c333aea36798d6eb4bf4343575409c84de161a40a8e7d2e42
pdf-font-stream PDF embedded font (sfnt) at offset 0x51A5 5184 bytes
font_01_sfnt_off00006344.bin
bf4a6b5c3f244adc35460adb774a7541649f3ec8b3df9fa58467070f0cbba958
pdf-font-stream PDF embedded font (sfnt) at offset 0x6344 9940 bytes
font_02_sfnt_off0000853a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x853A 4324 bytes