Malicious PDF — malware analysis report

Static analysis result for SHA-256 d091153dbb693ced…

MALICIOUS

PDF

43.9 KB Created: 2020-08-21 05:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f72d2b10ef1eedb597e58b4ad7ccd28e SHA-1: c530e8ba7b8c67d483dcf87221bfd4711874353b SHA-256: d091153dbb693ced2fb5d3f90f75229887d48d8a8fe5392a17397938df57466e
152 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, ttraff.cc, disguised as a game guide. This indicates a phishing attempt to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the lure text and the malicious URL.

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=epic+seven+gear+stat+guide
    • http://files.cork49gv.com/uploads/1/3/1/4/131437649/6800837.pdf
    • http://fomoko.toesin.com/uploads/1/3/1/4/131437823/kojivagufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/69975214030.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/visual_german_english_bilingual_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/47331956543.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/69528749213.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/xudanafiludexix.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/xpath-_query_for_every.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/jaxowodanex.pdf
    • https://cdn.shopify.com/s/files/1/0439/3923/3960/files/farsi_to_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/adobe_reader_8_free_download_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3555/files/kagupi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3136/1686/files/hosts_file_location.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_off00006057.bin
17c827462e2b6ecb55a2c3512d013619ff8e0c33341e9e9410cb52830e24a334
pdf-font-stream PDF embedded font (sfnt) at offset 0x6057 5000 bytes
font_01_sfnt_off00007169.bin
c8273a618ac36bdf523a3e43554f3dd9a4463bc964f7f2c6410fb34e6d86929f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7169 10336 bytes
font_02_sfnt_off000094d2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x94D2 4324 bytes