Malicious PDF — malware analysis report

Static analysis result for SHA-256 a302bd8bdca275cf…

MALICIOUS

PDF

46.3 KB Created: 2020-08-12 02:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc0954fc1a0c84c84654e45eea16cde3 SHA-1: 660efd237b95f76fb6e9e230228d088db65b3807 SHA-256: a302bd8bdca275cf68fed80e45f05699ccbecd7d99aae146d2a7580ea3b34a29
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body text, though partially corrupted, suggests a lure related to PDF translation. The ML classifier strongly supports the malicious verdict. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=comment+traduire+un+pdf+anglais+en+fran%25C3%25A7ais+gratuitement
    • http://xegabon.pthumc.org/uploads/1/3/0/8/130874043/bikej.pdf
    • http://files.whitneypatriceartistry.com/uploads/1/3/0/7/130739474/7841803.pdf
    • http://files.alphonseasylum.com/uploads/1/3/0/7/130740017/6993839.pdf
    • http://files.co-oplink.net/uploads/1/3/1/0/131069886/talif_giwawiluset_xotobefubele_rawuzakalibuta.pdf
    • http://bugub.girlstothemic.org/uploads/1/3/1/4/131437363/revebakejasikab-fexepufixul-powidufun-rajavemafig.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/55339916546.pdf
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/selojodilurelomoruv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/50237120157.pdf
    • https://cdn.shopify.com/s/files/1/0449/9125/0591/files/tecnicas_de_afrontamiento_al_estres.pdf
    • https://cdn.shopify.com/s/files/1/0441/1647/6056/files/kipalebapoponuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/sonebok.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/ideology_of_pakistan_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/5982697245.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/givotewuxulixufaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/repojagosigeloboxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2802/0373/files/wojurufof.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/paint_shop_pro_7_user_guide.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_off0000640d.bin
2fe0b5c311a2c6389da9fb59fc819c535341acc11843e73bc72e687b7cacd95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640D 5448 bytes
font_01_sfnt_off00007670.bin
1b6e960cbf4465e15c3b04e0976c9fd9f0f6f0404c31c29e9031072486ba964a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7670 11664 bytes
font_02_sfnt_off00009afa.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFA 4324 bytes

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