Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ccf6f18bae2c2c…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 09:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ee8e86d8bbd121be8ca35a8f6b1e38b SHA-1: 704ab5ca3b989a9959864354328fae79e275dee9 SHA-256: 61ccf6f18bae2c2c633e2c6e97a3d25aef88dfb757120b34534943007b156a6b
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://ttraff.com/wix?keyword=chargeback+dispute+letter+example', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it's a 'chargeback dispute letter example', indicating a phishing or scam lure. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm used to obscure the malicious redirector.

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.com/wix?keyword=chargeback+dispute+letter+example
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d960f1f71f894325888f121507b199c6.pdf
    • https://static.usrfiles.com/ugd/c3548c_0de849597e36487d8317f56e20285add.pdf
    • https://static.usrfiles.com/ugd/ca300b_b596b6a8af63420bb704ad470e191569.pdf
    • https://static.usrfiles.com/ugd/7f46b5_dcd2ae0e24db4d8888b6f59c560a24c9.pdf
    • https://static.usrfiles.com/ugd/f4de5e_010cbe1608fe4b96a460701d9699302e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/zamexokozixovazemetezoluv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/90475236915.pdf
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/workout_log_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/92543732009.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35a52cb868b4ccfbcf705065ad8575a.pdf
    • https://static.usrfiles.com/ugd/2274a7_5e808e4f25e348149d21e4cddad0fb2d.pdf
    • https://static.usrfiles.com/ugd/45fd81_0c8fc8f5c3fb4b4cbd47ef49ef32909c.pdf
    • https://static.usrfiles.com/ugd/5a1791_fd86e2d320b146c2b96acb461c68c1c1.pdf
    • https://static.usrfiles.com/ugd/dba42a_79c7fbc15a6b474da13e60bfc4604f02.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_off00007273.bin
3bfe87863ac26ed49d86f7afda0ec150c19b7d45808d1d26200faa3f9f59ee35
pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 5664 bytes
font_01_sfnt_off0000858f.bin
174fd06ee56d5ba577a7c00039735a31bba5a98540695564002994b10a0b2b8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x858F 10740 bytes