Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b684aaf4ddec40…

MALICIOUS

PDF

53.9 KB Created: 2020-08-07 18:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc449317105f468e88bc996f34e1299a SHA-1: bcfce88e91be8acc764427b872df8031864e724c SHA-256: f3b684aaf4ddec40f8b6b0e4cae93ee8042acf384fab73db05536812aed16098
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL and text related to entrepreneurship, suggesting a social engineering lure. The presence of numerous other links to Shopify PDFs indicates a potential link farm strategy to obscure the malicious redirect.

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=are+entrepreneurs+born+or+made+discuss+pdf
    • http://files.randiandmike.com/uploads/1/3/2/6/132695472/felumozu_nanibugufe_fipojozar_vunibubikowek.pdf
    • http://files.hudsonvalleygarlicgrowers.com/uploads/1/3/1/4/131438692/duloweruribavabozino.pdf
    • http://files.diofdl.org/uploads/1/3/2/3/132302998/rejug.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7017/files/45910132591.pdf
    • https://cdn.shopify.com/s/files/1/0448/6037/5201/files/basic_rules_for_discord_servers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/chauffage_central.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/tesizopimogopozute.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/85353932154.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/21244101592.pdf
    • https://cdn.shopify.com/s/files/1/0431/0076/6369/files/lifofifosoku.pdf
    • https://cdn.shopify.com/s/files/1/0445/4796/5087/files/static_in_a_sentence.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2103/files/wemimusebefasasewuzanuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/79444491324.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/canada_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/memixokuvesazuzaz.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_off000093f0.bin
e1353d2c58fc774743c5558cf938368339ea3592f6163ee1a3b04025e58987c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x93F0 5396 bytes
font_01_sfnt_off0000a62c.bin
34332ac11b72973dd323a92ed0eccd83e8af3f69b6a446037d7a6b67df08edf8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA62C 10596 bytes