Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a45c2cf4f395850…

MALICIOUS

PDF

41.7 KB Created: 2020-09-18 11:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 351d353feefe7a547903951b009aabc4 SHA-1: 4caa00e4d1ac02976fd2a2a91c1c2cec345c3900 SHA-256: 7a45c2cf4f395850b57f0b4fa2aaae3fd815a7d24dfbc11f70a68d24ec13122b
152 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Rappelz leveling guide" and embeds a large number of links, including one to a known malicious redirector at https://ttraff.me/wix?keyword=rappelz+leveling+guide. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this malicious intent. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links were embedded, likely to obscure the malicious redirector or for SEO manipulation. No scripts were extracted, but the embedded URLs and document content strongly suggest a phishing or redirection attack.

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.me/wix?keyword=rappelz+leveling+guide
    • http://judok.psychespiritfood.com/uploads/1/3/1/4/131437849/tefetepifune.pdf
    • http://files.leenaceraveeni.com/uploads/1/3/1/4/131483445/katavexutoxuduvafok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6985/files/tojabeluzawidusalavipig.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/jokatewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/ranugir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0565/6736/files/pes_2013_trke_spiker_v5_salam_indir.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/xoroluxego.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/kufokorufilowoxewavuvo.pdf
    • https://e166b6d7-67f8-4042-977f-1f47c0dcc6d0.filesusr.com/ugd/83e584_4ef7b5b92e2c46e8b06f108c5a9f0a9e.pdf?index=true
    • https://29f1ffc4-41cb-4bf0-aa2b-eb314b1adfa6.filesusr.com/ugd/ebbcbd_bf000a493cf2477aa4cede4a908c2290.pdf?index=true
    • https://38659d99-08d0-4b0c-904b-3f931663aef5.filesusr.com/ugd/154db6_6f65dd5c6ff74d7cb9fe48338b07a637.pdf?index=true
    • https://4fce9ef5-de3a-4b07-bb64-f054faf92882.filesusr.com/ugd/65b209_5cfa7ffc727146e0ae3c5c262b7b66d9.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006597.bin
aece255a4a6a29709a177efe2b1c2f34214f742ea5af17123279ff32872c0798
pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 4968 bytes
font_01_sfnt_off000076a8.bin
3e8aa9434af9fc29fa1c7fb5b3db2b89950bedb92ea932f9174d80e670d9c5bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 10468 bytes