Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0895083088fdc3…

MALICIOUS

PDF

59.0 KB Created: 2020-08-10 11:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b2aa4f2bf2f91ce1a1a68bad9c3e17 SHA-1: 58b274ed90c6ad94b0ee6903e2584d676944360c SHA-256: 5e0895083088fdc3b4c3389855240d0294fe7a17eb4a0658295ff47ec4d57e38
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a PDF link farm designed for SEO manipulation. The presence of a link to known malicious redirector infrastructure further indicates malicious intent. While no scripts were extracted, the sheer volume of links and the malicious redirector suggest an attempt to drive traffic to potentially harmful sites or to manipulate search engine results.

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=adobe+illustrator+tutorials+pdf+2020
    • http://parozugol.quilcenebiblechurch.org/uploads/1/3/1/4/131453870/f2ff0a01895ea.pdf
    • http://files.linguisticanalysistools.org/uploads/1/3/1/4/131438019/2786617.pdf
    • http://files.1169certified.com/uploads/1/3/0/8/130813887/mepezamazoda.pdf
    • http://files.mybaktcbd.com/uploads/1/3/2/3/132302802/waditabe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/xobufuvizodekerejuputaxed.pdf
    • https://cdn.shopify.com/s/files/1/0444/3337/5399/files/tipos_de_barreras_arancelarias.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/ludopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/zunofevitiduzuroxumuxum.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/fabawenuruvivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/minn_kota_edge_55.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/38158728282.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/jovumetaxipux.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/lizozuvogafutegeporawemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/cervical_cerclage_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/zodewatujokaxusirewawom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dae.bin
f573ce06b4a9beb1aa5609c120b92f98ec8d9520174c42c45fbf88ba39a7d1ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAE 8652 bytes
font_01_sfnt_off0000aa78.bin
0843b2b33e2427d41eac4b2e31e22fd15e4dbdb0261ac239fb045c9b8d0a2746		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA78 5440 bytes
font_02_sfnt_off0000bcff.bin
faba602b94e26785db5331b0e663cf575ff829e8ed16b30d4d11a9320f4756af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFF 9948 bytes

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