Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e2919acc449191…

MALICIOUS

PDF

49.1 KB Created: 2020-08-04 15:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689e2e2180e283ebd49db555807fbdb2 SHA-1: ae76c6dea0dc28eabc37353d13e554e62ec78a76 SHA-256: 75e2919acc4491918309034232e59aa6d001fd73eba6234f1fa5cdcfbc8941e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one prominent URL identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'types of metamorphosis in insects pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=types+of+metamorphosis+in+insects+pdf
    • http://files.blacklivesmattergj.com/uploads/1/3/1/4/131406840/nenuvexopixopa_pilepomunekokap_jokapenuluv_tizaxo.pdf
    • http://files.tasteofexcellencepdx.com/uploads/1/3/0/7/130739163/3543779.pdf
    • http://zurax.sjbcatholicschoolredbud.org/uploads/1/3/0/7/130740178/b97f79c.pdf
    • http://files.ashleyphotographyanddesign.com/uploads/1/3/1/6/131606011/ef8bc6a.pdf
    • http://files.greenelkrapids.org/uploads/1/3/0/7/130739443/fidozonujirelo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/kegototogegevubafelafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/98058225207.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/70160570875.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/31441143510.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/girudekitutalose.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/xujibadidemaroju.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/17988901336.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/divikobaxez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/tagakefimugad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/mexofozabonekosufofipak.pdf
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/24739306109.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_off000082b0.bin
958d5fb79679418ebc7fcb6ca0582866573058cfcb60021ba510192aace29689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 5416 bytes
font_01_sfnt_off000094f3.bin
2c07212e1e24efb17317de59b900d4d39d91c789e5a23e2c2c4ca73c7a4b832d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F3 9976 bytes

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