Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0948ea8ab824a29…

MALICIOUS

PDF

41.0 KB Created: 2020-09-11 03:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fd2e42c017ebedf2fe3dfe0baa074e4 SHA-1: 9329b804de0eca610e02964e941370f0f6b81ca7 SHA-256: a0948ea8ab824a29d402c90baacf65390c948f61529725035e9f4b95bdf30fea
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'ps4 emulator zip for android' and a URL that appears to be a lure. This suggests the document is designed to redirect users to malicious sites or download further malware. 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.link/pify?keyword=ps4+emulator+zip++for+android
    • http://files.hisembracinglove.com/uploads/1/3/1/1/131164260/2d5437d0.pdf
    • http://paneno.lethbridgelawncareco.com/uploads/1/3/1/8/131856772/zemokijedikap_befilo.pdf
    • http://files.zambezigametrails.com/uploads/1/3/0/7/130775197/zisavusokokinaj.pdf
    • http://rexoxajor.fruitforests.org/uploads/1/3/1/3/131384536/1305723.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99744184538.pdf
    • https://static.usrfiles.com/ugd/760101_5bc28852751d4e67a7acdd5082244b12.pdf
    • https://static.usrfiles.com/ugd/b50c55_ba34dad3cf8b4a0fa81c1b977695a127.pdf
    • https://static.usrfiles.com/ugd/f6a907_555b9385c85145cb80f5e8a839aa78e6.pdf
    • https://static.usrfiles.com/ugd/03ae60_670c9177701c452d8c2f2e07e67f07ad.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/format_bmp_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/canon_6d_mk_ii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/75942566424.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/angle_relationships_with_parallel_lines_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/ages_and_stages_questionnaire_7_months.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_off00005345.bin
19e166f4a0d1ee61dacd110b0e0d275bbc0661797fd0290d98990df4e1c820b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5345 5208 bytes
font_01_sfnt_off000064e7.bin
9d410bf0393354c3c069267eb5aa3233c7fe5504b72ff2fa0324762340014116
pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 10560 bytes
font_02_sfnt_off000088f8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x88F8 4324 bytes