Malicious PDF — malware analysis report

Static analysis result for SHA-256 95872de753adfaed…

MALICIOUS

PDF

73.5 KB Created: 2020-08-30 21:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fda1dbfc7703a8684f185cdfcc7016f7 SHA-1: 61195fdbf5dbd3f039493efbd94fef0d1e1f4f18 SHA-256: 95872de753adfaedcdd0778dc8ec4a586b97fc6a6c4efef2a8573e1c4dac2c3f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=summer+sizzler+crossfit'. This URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=summer+sizzler+crossfit
    • https://static.usrfiles.com/ugd/804ff6_2b873ee4724b4f1a9443c03a1f1c25ff.pdf
    • https://static.usrfiles.com/ugd/c83fdb_8e6b6c2a91094090859f3a3a41fa6354.pdf
    • https://static.usrfiles.com/ugd/0c41e7_90c3f1073b9242d9988488c58ba4a046.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/xikuvewemolofuwesagamawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/liviko.pdf
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/88407222862.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1880/files/captain_america_civil_war_full_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6615/files/97001352176.pdf
    • https://static.usrfiles.com/ugd/b8c837_982ba3c290874ee3ae1fe6249606b348.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_0826c3332593442bb6e45a1991afdc05.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8385/files/79429624442.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/zejawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/dukeved.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_off0000ca04.bin
415898ab9c5dde9fa54ad041fcd39285c326f613c8d8b94cdcd93b6e6f1643b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 4744 bytes
font_01_sfnt_off0000da25.bin
10b12b27b083ac112e56ac551426566db56b158ee894509482f3067d08a3d86f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 15880 bytes
font_02_sfnt_off00010adc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 4324 bytes