Malicious PDF — malware analysis report

Static analysis result for SHA-256 066b7aa37047c509…

MALICIOUS

PDF

47.2 KB Created: 2020-08-07 22:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff1701b05a67069677ae05c71e1cb6f SHA-1: 6f9cd206de60dd18d390b749274b334673e90eee SHA-256: 066b7aa37047c5099007f5d30c7588d1ce7726a4a40998ce9f0c364f0cb7c1b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body and heuristics indicate a lure related to free books, specifically mentioning 'Bsc zoology books for free in pdf'. The PDF also contains a large number of external links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic to distribute the 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=bsc+zoology+books+for+free+in+pdf
    • http://files.perryphysicaltherapy.com/uploads/1/3/1/4/131438142/900f05a.pdf
    • http://modewa.nalg.org/uploads/1/3/2/3/132303035/wuminujelifosagini.pdf
    • http://sobin.kriyaarts.com/uploads/1/3/1/3/131379578/murod_keleki_tofewosat.pdf
    • http://files.threetreesart.com/uploads/1/3/0/8/130814855/6881748.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/gutudasujipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/78524215550.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/nilonazofetufovo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/valid_palindrome_leetcode.pdf
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/68940615912.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0435/6086/1845/files/lutozezafevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/klasifikasi_aspergillus_niger.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/talemumomumen.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/40123625096.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/31560788224.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/zajabaresobebobufu.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_off00007acf.bin
73e15c09c4c6965c16c829fbc448d35a3048acd6326ae8e1dfb39d38ce997b7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACF 5520 bytes
font_01_sfnt_off00008db8.bin
eb57780551bf6e338b656bfac8cd5aa9ee16a0946cb15439bdafdbcbc40f2e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB8 9920 bytes

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