Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d89709dca9cc713…

MALICIOUS

PDF

35.0 KB Created: 2020-08-17 12:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b5ea659e16534055d836698b24bb5e SHA-1: ccae965c7aaaf967a828de606291657cc1701c7a SHA-256: 0d89709dca9cc7132220f81a886f528225384799cebe45472ee7b304ff2a2595
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for linking to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ayo+and+teo+like+us. The document body, though heavily obfuscated, contains references to URLs, reinforcing the malicious intent of directing users to external content. The ML classifier also strongly indicated maliciousness.

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=ayo+and+teo+like+us
    • http://gipodosud.mayotravellerssupportgroup.com/uploads/1/3/0/7/130776483/dajipud.pdf
    • http://files.blues-n-brews.com/uploads/1/3/1/3/131380052/jevefofed.pdf
    • http://files.side-hustle-plr.com/uploads/1/3/2/3/132303083/dizolotesunix.pdf
    • http://files.riveroakslearningcenter.com/uploads/1/3/2/3/132303020/5b5eba15.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/87412446502.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/45424494663.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/nekuluxofarilokal.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/mawetofubimirejugizapiwut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/fidemevevasewamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7506/6274/files/70371960220.pdf
    • https://cdn.shopify.com/s/files/1/0441/1362/5240/files/ashapoorna_devi_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/wasisivop.pdf
    • https://cdn.shopify.com/s/files/1/0451/4473/5909/files/zusetozi.pdf
    • https://cdn.shopify.com/s/files/1/0451/2520/6169/files/anorexia_tipos.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_off00004aa5.bin
7dcdc0b8227fdc20bc5cbeddca9aecd83e056de3af59ff5f4035754a6234553d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA5 4880 bytes
font_01_sfnt_off00005b54.bin
92b135ee5c265faa52b600079029cdc3ca4611d39cbdd7e24911ae5e190b3e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B54 10640 bytes

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