Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd251e6e65b4edef…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 22:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4405a55c5282dd0685045aeb33a268eb SHA-1: 97f89222357dc5ce53a178a144f9d94c436aa02f SHA-256: bd251e6e65b4edef390e6c98e9410881988a5ae07fa8b528241388e43f77f952
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=complete+ukulele+chords+chart+pdf'. While the document body mentions 'Complete ukulele chords chart pdf', the primary function appears to be redirecting users to malicious infrastructure. The presence of many links, including to Shopify, suggests an attempt to obscure the malicious destination and potentially leverage SEO tactics.

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=complete+ukulele+chords+chart+pdf
    • http://files.thatvintagesite.com/uploads/1/3/2/3/132303406/gisipomunupi.pdf
    • http://files.stmatthewsjamestown.org/uploads/1/3/1/4/131482991/458597.pdf
    • http://files.schlichamericanlitghs.com/uploads/1/3/0/7/130776205/nozubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/39681901790.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/kideran.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/masijajewipudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/discussion_method_of_teaching_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/garevifupip.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/465725555.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/92215998650.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/80638471916.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/advanced_mathematical_concepts_precalculus_with_applications_student_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/8174/1976/files/quicksort_median_of_three_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/50541107788.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/rikejilojopof.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_off00005ae2.bin
b987e4ccd4d9f99bc5ceb8aab4851a9eb8e270b6b07f3408c3c6b77a083987ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE2 5364 bytes
font_01_sfnt_off00006cf5.bin
3f0d3e820735e528102e8546028c0fbf569347c719c8b15ea320419b04852572
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 10044 bytes
font_02_sfnt_off00008f9c.bin
184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9C 16120 bytes