Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde84d9c04a3662d…

MALICIOUS

PDF

59.7 KB Created: 2020-08-18 20:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2deef4a7c3a7bc58cf1587c6b73e3723 SHA-1: 76eb451b11296a4f99a9b7e3af4f7de8df58f037 SHA-256: fde84d9c04a3662d1a44c6332968c17d7e952d0fd9c817e558c3e32bec380952
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=android+search+action+bar+tutorial'. This indicates the document is designed to redirect users to malicious content. Additionally, a PDF link farm heuristic was triggered, suggesting a large number of outbound links, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several Shopify URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=android+search+action+bar+tutorial
    • http://files.wesparklearning.com/uploads/1/3/2/7/132741375/06f573285.pdf
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdf
    • http://pepaz.fymandco.com/uploads/1/3/1/3/131384169/lewim_tabulakute.pdf
    • http://files.survivinglogic.ca/uploads/1/3/0/7/130739601/8761311.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/41119493536.pdf
    • https://cdn.shopify.com/s/files/1/0440/2718/3269/files/artistic_filter_photoshop_cs6.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/nifavuwowesuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/42885507613.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/38341272494.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/45073603289.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/47984661250.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2508/files/tofobewoduxinok.pdf
    • https://cdn.shopify.com/s/files/1/0438/7058/4987/files/jatebafafowejutefinari.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_off00009d9a.bin
c0c1d91e1fb336756944d3d70e2f38f07bf342cbdbf8f336110f37c2be97485f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9A 5036 bytes
font_01_sfnt_off0000aea6.bin
ef164ec3cdf5b7c04197d34d58f90321e7cc54b77be1e7a3da0a6e047d639f2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA6 10940 bytes
font_02_sfnt_off0000d410.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xD410 4324 bytes