Malicious PDF — malware analysis report

Static analysis result for SHA-256 3102cb4c30f66c1d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 23:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3211a3bed7b9c0b41cf2a584eaa1a64 SHA-1: 4a30f3b8b438db827238f63adf23894295db0a9e SHA-256: 3102cb4c30f66c1dd488878fdd1243314f7b1fd715aa87cdddeba9c4894a3613
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The document body, though partially corrupted, contains text suggesting it is a 'league of angels 2 abyss guide', a common lure for malicious content. The presence of a large number of external PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating an attempt to distribute malicious content broadly. 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.com/pify?keyword=league+of+angels+2+abyss+guide
    • http://files.unionkitchenny.com/uploads/1/3/2/6/132681398/b5001f0a3e1.pdf
    • http://files.suitelifeonsas.com/uploads/1/3/1/4/131406430/7138623.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/1534622522.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/mapemitasofurobobakakewoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/51811492636.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/mobarofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/49678070667.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1314/files/5001099595.pdf
    • https://cdn.shopify.com/s/files/1/0434/3916/1500/files/fda_cfr_21_part_11.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/panasebo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/iris_dataset_csv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/92658873091.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/xowufukelegasuji.pdf
    • https://cdn.shopify.com/s/files/1/0447/5250/2935/files/28923048886.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_off00006ef3.bin
a6ba40baa6ace70e0c512181cd9316efd9fc9b208dd711e7c1741bd3fe4f58c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF3 5292 bytes
font_01_sfnt_off0000811b.bin
2a9d453d71e8ab660d520a51febe62759e66c60d4b5de26956d3076d78cc080a
pdf-font-stream PDF embedded font (sfnt) at offset 0x811B 10924 bytes