Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af4fbd7e20b994d…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 09:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22bbd48ba623e6b339cc7cdf4ced8903 SHA-1: b3db3cff4063190f0bb80fc3e67fe71593d6f580 SHA-256: 5af4fbd7e20b994db0e7920b170c5ae0f0db9f0b39e2a300aad33aedeb815813
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous PDF links, many pointing to benign Shopify URLs, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination.

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.me/wix?keyword=wicca+for+beginners
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3406/6594/files/6096585446.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/boneloxukenejumonejalod.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/kegosodorusesogibelat.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/bajopinidazelogazok.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/tirofadalif.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1237/files/4298423747.pdf
    • https://cdn.shopify.com/s/files/1/0460/8675/0372/files/how_to_highlight_in_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66264102559.pdf
    • https://cdn.shopify.com/s/files/1/0466/2650/4869/files/kerugixazujuwabibipive.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/vesobajepolaminuleke.pdf
    • https://static.usrfiles.com/ugd/b7306e_8494bb3725af4e5aa4c1c1fda57bbddb.pdf
    • https://static.usrfiles.com/ugd/77d535_7a5aa958012f4ca690bff9c990d42596.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5454b90080f4979982861724bee7770.pdf
    • https://static.usrfiles.com/ugd/405339_81f501478e5d4b359b8d8d30b0066070.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/noviwogujixevaxama.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/sogebulixufatewabupago.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e42.bin
c194e431302ea5acb7e7f75a55c4f5232a58297996e34c02aa379e389d107c1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 5168 bytes
font_01_sfnt_off00008ff6.bin
94d2cc3699470f57fb67c5f46d0fd540013030319b88bd54a525100d95565224
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF6 10208 bytes