Malicious PDF — malware analysis report

Static analysis result for SHA-256 335033396cfd6b78…

MALICIOUS

PDF

40.0 KB Created: 2020-09-05 06:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c0cd6026e70deb40aeffc23dde7f89 SHA-1: 8830e76aeb0599b5531ab97815f707b5000ff55d SHA-256: 335033396cfd6b78d0df24daa0d2cc137367859f01990851deb85a323543fe4d
142 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=anki+app+ipa' which is presented as a lure for an 'anki app ipa'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.link/wix?keyword=anki+app+ipa
    • https://cdn.shopify.com/s/files/1/0447/5099/5610/files/iiser_aptitude_test_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/kesojabewi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/juxal.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/26464311639.pdf
    • https://static.usrfiles.com/ugd/f80014_fbb16eb005154b659347eeaba9cdb61c.pdf
    • https://static.usrfiles.com/ugd/09273f_4fd1ab21e3f142f7861736a5f0e95617.pdf
    • https://static.usrfiles.com/ugd/10b11f_ccd8bc58d5dc413091b14c645145ebe5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c6641363833409b82816d758d0509e3.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/kemaso.pdf
    • https://cdn.shopify.com/s/files/1/0438/6501/4437/files/41765386136.pdf
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/marketing_kotler.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/43542883306.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/74908691420.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/bethel_church_worship_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/alternaria_solani_en_tomate.pdf
    • https://cdn.shopify.com/s/files/1/0435/6381/0975/files/barbour_t_shirt_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/kurta_chadra_song_gippy_grewal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061fc.bin
ef2a7c39b607ca829c33b8b69032e6d9e505d324346a4b82da6ddd20717d4131
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FC 4560 bytes
font_01_sfnt_off0000719a.bin
c5ce57060b744a65b72be8d01de86e29fe7b3d7bbeb1cb01b3620949ba711044
pdf-font-stream PDF embedded font (sfnt) at offset 0x719A 9904 bytes