Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b39715fde4516fd…

MALICIOUS

PDF

40.8 KB Created: 2020-08-13 22:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df64732c84859a15b08fc31f897b9ec2 SHA-1: 614e934b8f7d1f76a73e21637991af45349f3ddc SHA-256: 2b39715fde4516fdd5ec4267563e701bdf53576a30e20dc281521ebb7de6eac8
154 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=charters+towers+state+high+school+uniform', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the document body is heavily obfuscated.

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.ru/pify?keyword=charters+towers+state+high+school+uniform
    • http://files.davidjsimpsonart.com/uploads/1/3/0/7/130776819/mumoxineruf_josite.pdf
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.pdf
    • http://files.tshaylaslayher.com/uploads/1/3/0/7/130740625/5128a.pdf
    • http://files.themanimalchronicles.com/uploads/1/3/0/7/130740073/pixilusi_megun_wotadeboxiwali_tudil.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/7546923622.pdf
    • https://cdn.shopify.com/s/files/1/0450/7946/2040/files/geneva_switzerland_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0490/files/17068417311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/96870524097.pdf
    • https://cdn.shopify.com/s/files/1/0438/1795/9586/files/armadura_de_dios_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/2093518526.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1531/files/lab_safety_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/22026722399.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/sizobonajababaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/ichirin_no_hana.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/duxefigosesenuwomevazela.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_off00004689.bin
31856ab57e120e22927dc28cf05f6d1001bf7b6044ba58b98c2cfc90fc894bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4689 7564 bytes
font_01_sfnt_off00005fc3.bin
880847dafdbe9ce7a61f88d6a3a00fbacf3380f019c6a918e6a9da16d3e9fc7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 5292 bytes
font_02_sfnt_off000071b1.bin
55c0ed0200a3039bf9d8d07d4954fbf058d54b35fbbe45c51b9ce7b99458f028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B1 10616 bytes

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