Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c5ed3f940dccca…

MALICIOUS

PDF

49.3 KB Created: 2020-08-12 13:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f46f95f3477432f82d596ac21f68b09e SHA-1: 9d45c6d4a297f1cf2a1237aa74a8f083600fbb5b SHA-256: a9c5ed3f940dccca76d2cfe4d7fbe009f732f56a348b6f00675cf4cbaffc5f50
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains a URL that appears to be part of this link farm, pointing to a redirector service. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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=sales+and+marketing+assistant+interview+questions+and+answers+pdf
    • http://nipigas.ltcampervanconversions.co.uk/uploads/1/3/1/4/131438330/daruxewedopok.pdf
    • http://papasul.lazytk.com/uploads/1/3/1/3/131398140/daminefep.pdf
    • http://lokerujal.musicianarchive.com/uploads/1/3/0/7/130739553/visemovonen_fibitoganox_pejovus.pdf
    • http://files.techrox.org/uploads/1/3/0/8/130873822/nixosagozosa-betakunavek-dewoluxal.pdf
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/pivojisomup.pdf
    • https://cdn.shopify.com/s/files/1/0434/4466/6529/files/sedali.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/jigewuke.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/54262661.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/biomagnetic_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/fixakaxufatiwep.pdf
    • https://cdn.shopify.com/s/files/1/0432/2938/0767/files/84186951293.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/awaken_the_giant_within_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0444/2993/4758/files/practical_english_usage_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/54347933064.pdf
    • https://cdn.shopify.com/s/files/1/0437/3617/0657/files/2898385209.pdf
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/90933496129.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_off00007388.bin
71719f36b5d2b441018a24ab1a09e4a200a269690478a4ce2232d2bf39a9bd27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7388 5688 bytes
font_01_sfnt_off000086ca.bin
42aa9279d2be2e98c25e4824518576a8d57daab8d6e2aa0d32879bdb7100988a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CA 10028 bytes
font_02_sfnt_off0000a906.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA906 4324 bytes

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