Malicious PDF — malware analysis report

Static analysis result for SHA-256 621592f0730ffd3c…

MALICIOUS

PDF

45.1 KB Created: 2020-07-30 01:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85e6da636e68bb6cb02afc4e77de99df SHA-1: 6cab6a405f26f7fe00dcfe4c1cc1b0f9db313cb5 SHA-256: 621592f0730ffd3c8aa8abe4ec7e439f6a2716eed905e6a344ac861700f09cbb
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'alcohol consumption in adolescents', likely a pretext for a phishing or scam operation. The presence of numerous external PDF links further supports 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=consumo+de+alcohol+en+adolescentes+causas+y+consecuencias+pdf
    • http://files.mjlpa.us/uploads/1/3/1/4/131453453/2154733.pdf
    • http://files.newulmturnerhall.org/uploads/1/3/0/7/130740212/390eeeec6c8.pdf
    • http://files.main-global.com/uploads/1/3/1/3/131380181/zuturizidod.pdf
    • http://files.homefromhomebandbwinchester.com/uploads/1/3/1/3/131397996/lajajozoxo-vetewixepum-rejinagafo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8220/2782/files/2575402631.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/94864417268.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12247178291.pdf
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/jezinabuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/46779938752.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/rusewinisago.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/77423836454.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/nirafosorikepedewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/20152554729.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/32420876053.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/45619935162.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/jipujazixikudiweluk.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_off00006f0d.bin
35179a5bb3875a2619d30d50260d40f243b7a3d3871bcfbe3dc30556ce027048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0D 5304 bytes
font_01_sfnt_off000080f7.bin
b9519007d25524cf4f239f3b43e5c268f634d9f6241a0450d33119d2a64998bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 11004 bytes

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