Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ea859da72a8443…

MALICIOUS

PDF

43.4 KB Created: 2020-08-01 08:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f4c1a425f198e61eaaa90ed8c48c5c0 SHA-1: 68e1e5b2686ae595916eb4d3bf1e2fecc4f582a9 SHA-256: a4ea859da72a8443ba6df9f108fefbc3753db1c6e4a274a24802c477a89d19f6
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 external PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body contains text related to '1974 chevy truck' and the authoring application 'wkhtmltopdf', suggesting a lure or content generation method. The presence of a malicious redirector and a link farm indicates a phishing or SEO poisoning attack.

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.com/pify?keyword=1974+chevy+truck
    • http://files.jenndepaola.com/uploads/1/3/0/7/130775009/novur-keregesatuzuzu.pdf
    • http://files.alexdanielski.com/uploads/1/3/2/6/132680908/f7c60bcea933d.pdf
    • http://files.100ways.org/uploads/1/3/1/4/131407042/kibigu_wizipe_woberotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/rifegukasuzapurowibit.pdf
    • https://cdn.shopify.com/s/files/1/0429/4069/4684/files/xofovoxelesalupajefusugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/letesobofodevil.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/lumexipatewezuvakuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/18028077937.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/rogogakosatikewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/ferelawapelugod.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3031/files/heroku_push_master.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/kidosotixigod.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/59173805123.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/veteduxotaxemawesidanaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/49593465296.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/xiveniguzowuzodarazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7611/4837/files/45507547721.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_off00006a7f.bin
dbe1868156c4e23cf0470faad506d5eaf7d9510748f1607a7c0aa8e3597c62d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 4972 bytes
font_01_sfnt_off00007b89.bin
8ff8b780c5db33ab596893fcd6fac5319710b4d0cf4f78497fa7edc123bb7a28
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B89 10936 bytes