Malicious PDF — malware analysis report

Static analysis result for SHA-256 6201fd05439e180c…

MALICIOUS

PDF

39.3 KB Created: 2020-07-17 22:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0b3890508f91a5c7603ebcd155c66ca SHA-1: aae40e1553202d2c642c651a20b431d29b30eb62 SHA-256: 6201fd05439e180ce8ca12ff6c9794c9b12189a91789b5766c12972499474c58
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or lure users to malicious sites. The ML classifier also strongly flagged this document as malicious.

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/wb?keyword=hp%20proliant%20ml350%20g6%20quickspecs%20pdf
    • http://files.equityallies.org/uploads/1/3/1/4/131452887/jusisipesoku.pdf
    • http://files.baysidecapecoral.com/uploads/1/3/0/8/130874490/b441d8a8edd84f2.pdf
    • http://files.landonmondragon.com/uploads/1/3/0/7/130739457/nomixufofegitoja.pdf
    • http://files.pmjeepdepot.com/uploads/1/3/1/3/131380583/kufimifaroza.pdf
    • http://files.90daychallengewithamber.com/uploads/1/3/0/7/130739789/ginogeroxepeseb_xoraxotisino_fezoviv_rubot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/xotaba.pdf
    • https://cdn.shopify.com/s/files/1/0428/8177/7827/files/roxojoxuvapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/tunotopof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/tekuwebabadaxob.pdf
    • https://kudivex.files.wordpress.com/2020/06/54803199178.pdf
    • https://xobisejofu.files.wordpress.com/2020/07/74463878613.pdf
    • https://sipivasug.files.wordpress.com/2020/07/26383587996.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdf
    • https://cdn.shopify.com/s/files/1/0430/8729/8714/files/42186177139.pdf
    • https://cdn.shopify.com/s/files/1/0430/3237/9545/files/vabunerapuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/940750281.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/26572466541.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.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_off00005a8d.bin
90c1805d116de3d5468785fbb9647d250ff593516a004be511df174a2ca11c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8D 6092 bytes
font_01_sfnt_off00006f13.bin
d704c101b82c80dae9cb8605dca3e2892a8b11fb2dea842c4452912bfa2afe9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F13 9652 bytes

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