Malicious PDF — malware analysis report

Static analysis result for SHA-256 0708a08b1b8dd76a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 02:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fe2d8dfeed09f9d0ea78759af2c89ae SHA-1: 554fc172d4a042b62725f719b2b9645047ffdabb SHA-256: 0708a08b1b8dd76ac4ec0494e386239ad6447401edf5ea4c8d344737343c7817
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=dehydration+in+infants+pdf', which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise its malicious nature.

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=dehydration+in+infants+pdf
    • http://files.truthlifevictorychurch.org/uploads/1/3/1/3/131383821/zowefode.pdf
    • http://files.stayinthearena.com/uploads/1/3/2/6/132681482/d202e4ae.pdf
    • http://files.literacytakesflight.com/uploads/1/3/1/4/131409498/03c0cf.pdf
    • http://files.laurenhendersonmusic.com/uploads/1/3/0/7/130739678/zuledibovoweta-zipuvuv-jukajomemiwuda.pdf
    • http://gufexota.hayonpark.com/uploads/1/3/2/6/132695535/39f64608be97c6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/gasaxarelikerefona.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5398/files/game._co._za_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/49516913283.pdf
    • https://cdn.shopify.com/s/files/1/0451/7157/2885/files/gelume.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/162460621.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/jebopoliribujiveduvolu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/23853072199.pdf
    • https://cdn.shopify.com/s/files/1/0432/8741/2900/files/lapajefuwuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8018/files/wolazuzifoxex.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/xutakazujerodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/17325053293.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_off000072c5.bin
eea5e9b53ea92f8fc5cc4f634d9194ca262cda457f7578ae7eb9879a12e9e742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 5200 bytes
font_01_sfnt_off0000847e.bin
427c064593b88da20b85792dde9978541f65bb1bfd96daa82521ac10cc3afd89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847E 10548 bytes

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