Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c556e3757a52cc…

MALICIOUS

PDF

38.5 KB Created: 2020-08-27 22:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d635f53f238b6e8578cedb1f8ffdf08 SHA-1: ea4ddb56667f0c7ecf93056d63f7fd337e34628d SHA-256: 78c556e3757a52ccee5cd2290d2e0617a7aa75eb805e86ab8b402f6e8b5cd1b8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=alex+rider+eagle+strike+pdf+free+dow', is identified as a malicious redirector. The document body text, though heavily obfuscated, contains this same URL, suggesting the intent is to trick users into clicking the link, likely leading to malware download or a phishing page.

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=alex+rider+eagle+strike+pdf+free+dow
    • http://files.aymestreyschool.com/uploads/1/3/2/3/132302870/jimoxezoraj.pdf
    • http://rofosopap.charliwhat.com/uploads/1/3/0/9/130969300/pezonogitexuxep-repuf-modifuzu-majimijid.pdf
    • http://binadaxev.storiestoldbyholly.com/uploads/1/3/1/8/131856158/sujopujidowem.pdf
    • http://files.sandyhuntsberger.com/uploads/1/3/0/9/130969499/jezumujeziliriniza.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/kitekinefugimorikir.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/30749445861.pdf
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/lotox.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/11100610933.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/61684846810.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/83771716180.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/87881309639.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/fuzekusojunusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/kavaxamukus.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/1080p_sample_video_mkv.pdf
    • https://cdn.shopify.com/s/files/1/0438/0295/1842/files/zarirusaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/jubobibam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/wais_iv_administration_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/75623715144.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_off00005839.bin
cb5582654ccadf221b319e25fdcac7e2a3f3285cd541c1455c9b3e10431e3ffc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 5420 bytes
font_01_sfnt_off00006ad2.bin
b32ed7104ddc5fd6d8d942d67eb8670cd0e9018b4ba49e237cbfafe3be603c90
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD2 10080 bytes