Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e8e7071ae89fe2…

MALICIOUS

PDF

50.6 KB Created: 2020-07-23 17:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e172cda4706a850dd9e6c6d72ce0eacb SHA-1: 55ebcda8b8a7d2aa324a45f21ef58544ee612187 SHA-256: f2e8e7071ae89fe2cd515d4bd1ea46aa4472886b69a50d428e9f73d0d2a571ab
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, ttraff.cc, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure to disguise the malicious intent of the embedded links. 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=baby+boy+brown+formal+shoes
    • http://files.decgallery.com/uploads/1/3/1/3/131384789/cc8b20d.pdf
    • http://files.woodcraftguildtasmaniainc.com/uploads/1/3/0/8/130814340/830762.pdf
    • http://files.rebeccaguay.com/uploads/1/3/1/8/131871484/busojis.pdf
    • http://files.rebeccaguay.com/uploads
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/giduxizeretewezedogesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/15399746659.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/82639743305.pdf
    • https://cdn.shopify.com/s/files/1/0433/8414/4037/files/36813138867.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/godepokajutatinojul.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/55776846238.pdf
    • https://cdn.shopify.com/s/files/1/0434/5492/2902/files/gedisej.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2720/files/57181061455.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/gelurax.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/64700077044.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/68582790340.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/72341866933.pdf
    • https://cdn.shopify.com/s/files/1/0433/7549/3271/files/lopaxaligezupogigumodire.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006568.bin
8a39080ea61b9ca71c35c07730bbb4fb475f2d9c420c3eecd6edd3ef5e6f41a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 5052 bytes
font_01_sfnt_off00007665.bin
71d489ca799b404f92f1f265c0ad790831edaee34d417a17e5a0bcd97902c65b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 2484 bytes
font_02_sfnt_off00008104.bin
b1868486cf6a0d7f99bf58b66e5d17e21efc640ad15eb6ca342dc516665a97c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8104 11348 bytes
font_03_sfnt_off0000a6dd.bin
fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DD 16384 bytes

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