Malicious PDF — malware analysis report

Static analysis result for SHA-256 8119927ffcddf016…

MALICIOUS

PDF

41.0 KB Created: 2020-08-01 06:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86015e9db1a3537a90b285f4152e93e8 SHA-1: 1aa5d28f019601f85b92d0b264588f9f66ec9e7f SHA-256: 8119927ffcddf0167f38779c870c0dd51c5bbe33d63194a9504a6ba9925f83de
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to URLs that likely serve as lures to malicious or phishing sites.

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/pify?keyword=asu+uniform+setup
    • http://files.musicdepotrocks.com/uploads/1/3/2/6/132696044/6639480.pdf
    • http://files.gravityalternativemovement.com/uploads/1/3/0/8/130813639/8779145.pdf
    • http://files.zushkabiros.com/uploads/1/3/1/8/131871699/3306636.pdf
    • http://files.imperialphotojkt.com/uploads/1/3/2/3/132303117/189443.pdf
    • http://files.nejumpersassociation.com/uploads/1/3/1/3/131380063/3964024.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/zudegubogamigosep.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/pizixu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/jogilezusebokebasetem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12319118289.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/49876659278.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/ranaboverekog.pdf
    • https://cdn.shopify.com/s/files/1/0437/8725/5970/files/40938436579.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/15929346306.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8902/files/jobadufar.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/rutijipofofif.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/fixunig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/lorenamowovefapolamafunok.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_off0000649d.bin
69f57460897eafadf67850160ab5bb36442ed7371bc791bd6b842a592adf172d
pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 4792 bytes
font_01_sfnt_off000074d6.bin
e09f3aa7c8b27805fd5b5776b4f73b8848c9a4f4792641ee968135404ed4b714
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D6 10092 bytes