Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13ab10b1d6e4e9b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-10 08:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4743be6096e4b72cb4e3f6f56921acd3 SHA-1: 203eb3928ec088d18da5e9ccda562c96778c6ef3 SHA-256: a13ab10b1d6e4e9b8530b9e056d85288cf63bdd1fff13babc4ca86f72e4934d5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic match for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=public+speaking+techniques+pdf'. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, with the primary one being 'https://cdn.shopify.com/s/files/1/0430/3486/9921/files/xivokirusemuwobatitapikeg.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the intent is to redirect users to potentially malicious content under the guise of providing public speaking techniques.

Heuristics 3

  • 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.
  • 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=public+speaking+techniques+pdf
    • http://files.ohiohostclubs.com/uploads/1/3/0/7/130740420/8325619.pdf
    • http://files.tradeforward.com.au/uploads/1/3/1/4/131437322/4648567.pdf
    • http://files.reedcooper.net/uploads/1/3/1/0/131070113/mukusugexezud.pdf
    • http://files.ministryofunderwear.co.uk/uploads/1/3/1/6/131637136/7287958.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/xivokirusemuwobatitapikeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/32755708761.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/javuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/94495825322.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/49429942688.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8215/files/galufozif.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/54119980192.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/41105161322.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/33672977438.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/72609966455.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3925/files/difisutujofo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/4165302979.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/importance_de_l_alphabtisation.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_off000073c2.bin
2d9997b0140a169960c7c2f9ca8f047336482b7a82d54eb025264ef316d0075c
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C2 5424 bytes
font_01_sfnt_off00008613.bin
6c8ea1aa43ed9eb1cb0bb3a1f159cdc41b1daaf2690bd2e3ec0cc29955cef1c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8613 10072 bytes
font_02_sfnt_off0000a889.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA889 4324 bytes