Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ae613ecb8863e2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-07 10:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 365563d0c6c7571f23abf62a8c997399 SHA-1: 29637a45abdaa3b1a8d2ed47f28deae097cf9285 SHA-256: 34ae613ecb8863e2c0c63d8b05c45ff9edc1bcdb120c070f85ae2cef73f7f106
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to 'Bsc nursing 1st year question paper 2020 pdf' and the malicious URL itself, suggesting a lure to trick users into downloading or accessing further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious redirector links.

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=bsc+nursing+1st+year+question+paper+2020+pdf
    • http://gibotu.thejamesriceshow.com/uploads/1/3/0/8/130813054/7261570.pdf
    • http://dajebep.tubietsai.com/uploads/1/3/1/4/131454065/8074719.pdf
    • http://files.glendowiecommunitycentre.org.nz/uploads/1/3/0/7/130775892/90da112ee608479.pdf
    • http://pufoxi.longosfinancialmarket.com/uploads/1/3/2/6/132681947/0f464fb.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/85487365809.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/buderopegeja.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/patch_7._1._5_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/cox_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/the_beatles_20_greatest_hits_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/femeximedug.pdf
    • https://cdn.shopify.com/s/files/1/0429/0111/0940/files/46082987710.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/tezobimapazewin.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/error_code_0x80070020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/blockchain_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/juvuforokamuxinifetoxowal.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/
    • https://cdn.shopify.com/s/files/1/0433/7552/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f9.bin
9c65b433aeee3e20c3565a2b5f61f11e1d3c41dd6004ee48cdda39d7f9464caf
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F9 5892 bytes
font_01_sfnt_off00007d21.bin
b09762c7afafeabdc5c66f20b8c4b08f163dc38730a2575be9f695b56ba2a62d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D21 10168 bytes