Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba756ea101aad84f…

MALICIOUS

PDF

41.4 KB Created: 2020-09-02 00:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28cd176a3335a71113493b26f4ee3c12 SHA-1: 27674e5bc389e5a3a70cfcbc13560d658a71f273 SHA-256: ba756ea101aad84f0047ff928cea033e2d65d7aa376d89ded9383ffb632c5633
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which are part of a link farm pointing to external PDFs. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious payload. The ML classifier also strongly indicated maliciousness.

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=gannett+peak+trip+report+2019
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/paxeno.pdf
    • https://cdn.shopify.com/s/files/1/0460/1328/4511/files/kakajejuvofupafatugepi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/rujoranisorekelo.pdf
    • https://static.usrfiles.com/ugd/e02969_d54adb8d549f46318965c9c2d1aae881.pdf
    • https://static.usrfiles.com/ugd/e4ff69_c7cd9bd6a2fa4800984c536b090a217b.pdf
    • https://static.usrfiles.com/ugd/a4d998_b071db01c26f45ba9783ed13e4e6490b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ab7b7970844811aeeabe7b5dd323dc.pdf
    • https://static.usrfiles.com/ugd/7d21c0_a1671ae056874102b0b4750748d85cda.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3c561d49f9c4aaa833ece0aa19a4986.pdf
    • https://static.usrfiles.com/ugd/a2e20a_ca28864eb5b243629bc1b0b86508bb71.pdf
    • https://static.usrfiles.com/ugd/162fe6_24098a791c78475fbf9502d51875585b.pdf
    • https://static.usrfiles.com/ugd/b97cba_d1b0b0a8a5834c12b3334321b3523372.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/morurawasozadefomufunuwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/aranyak_story.pdf
    • https://cdn.shopify.com/s/files/1/0450/8745/7432/files/3621719804.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/zeguju.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/lekufatutelepovune.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_off0000659c.bin
7b4b6d75cea4db0094acad0bf16515fa844ee58198fadf5792b7a96cd1807e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 5180 bytes
font_01_sfnt_off00007753.bin
6526112c637c28035c8cfa9a6a5327ca3ba7f71165b7e16cf376b121f5d2e48e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7753 9768 bytes