Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c62a27decc6bcf…

MALICIOUS

PDF

49.6 KB Created: 2020-08-02 20:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb22187f8d784d3794ff4f068f2db385 SHA-1: bccbabac0b93a538a88928221d1ea4710f3dd8c6 SHA-256: 56c62a27decc6bcf2120d884ce66b950d059f58b2a3189761ed13839dbb81779
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 redirector service (ttraff.cc) or are part of a link farm designed to manipulate search engine results. The ML classifier strongly indicated maliciousness. The embedded URLs suggest a phishing or redirection attack, aiming to lead users to 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.cc/pify?keyword=css+guide+pdf
    • http://files.srvgermanschool.org/uploads/1/3/0/9/130969183/gipiruwiwem.pdf
    • http://guwukofi.myfaeryoracle.com/uploads/1/3/1/8/131856185/6343104.pdf
    • http://files.biblesforasia.com/uploads/1/3/0/7/130739764/resod_jifolekafut_wiweguradu.pdf
    • http://files.jessicalunn.com/uploads/1/3/2/6/132695519/7156711.pdf
    • http://files.stephaniemiracledances.com/uploads/1/3/1/4/131437464/jikasibijexurij.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/baniketetuvogude.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/96152379843.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/51428576109.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/10675051960.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/17414461906.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/xabudunajukonurot.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/jasopedatoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/62797335270.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/frank_s_great_outdoors.pdf
    • https://cdn.shopify.com/s/files/1/0438/2395/6125/files/batamajukepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/39453852011.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.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_off000078c1.bin
fff83a76ecd9eb2e814ac5887a609229f55f2e951a267d7f59315db799fe9edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C1 4480 bytes
font_01_sfnt_off00008805.bin
615688f15d5d467fa556e2390c3513c1538902e457a6b08bc27e68ece5c83dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8805 10516 bytes
font_02_sfnt_off0000abb9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB9 4324 bytes

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