Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b8e272288f205c…

MALICIOUS

PDF

34.4 KB Created: 2020-08-27 18:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 081c59007eeadd1d7e20d3b2fffaa272 SHA-1: 56aebd596886dd3ba97544740b664358e410c41a SHA-256: 26b8e272288f205c3fe140c5a47ada69c8d6b65ae2414d8e64ed76026ef4c623
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body text, though partially corrupted, includes the same URL and a title that appears to be a lure. The presence of numerous external PDF links suggests a link farm or redirection strategy, likely to distribute further malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a malicious redirection or phishing attempt.

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.link/pify?keyword=cen+tech+90899+manual
    • http://files.belmonthighlibrary.org/uploads/1/3/1/4/131407424/bukafuzirusaz-dijobisufatebaf-wexobasetinudib.pdf
    • http://files.kaylacranston.com/uploads/1/3/1/3/131398075/9666979.pdf
    • http://jaxidefe.autumnskyadornments.com/uploads/1/3/2/3/132303238/dijame-pefozujojoxu.pdf
    • http://pijabe.stauderwood.com/uploads/1/3/1/4/131453213/zuparidabafunigeleto.pdf
    • http://files.homey-sf.org/uploads/1/3/1/4/131453252/gupunaj-xinuwarijure.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/jirawevukemejezugipomuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8120/2854/files/japawirifinezuvatalixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/nudus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/school_yearbook_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8116/files/tadix.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/wojemiwetulik.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/mugen_rao_abinaya_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.pdf
    • https://cdn.shopify.com/s/files/1/0440/4848/2454/files/just_cause_3_dlc_starten.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/wezuvewunumitovudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5999/4014/files/technical_communication_today_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5253/0845/files/bojirotuvosituxe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000498b.bin
6034ea3d537078d7ec7251a600b42b1a041e91a25794ae00f5ecf3e137e5c002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x498B 5160 bytes
font_01_sfnt_off00005aee.bin
49da475d453cd092c7b13bf6f8034e387a15601dd61d8f6a7ce0956e66d7e048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEE 9896 bytes

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