Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7d5c12078daf54…

MALICIOUS

PDF

45.3 KB Created: 2020-08-04 15:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 737c83ce077c7dbfaba53d1540af3f9c SHA-1: 30e2911fbb7b940c8803b0b3be69fe197bf79d0c SHA-256: 7d7d5c12078daf54ba87a81dde8b6715a935bfc18af4b03d437b34bf3fd31db1
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically a URL designed to appear as a free download for 'Ignou assignment front page pdf'. This URL, https://ttraff.cc/pify?keyword=ignou+assignment+front+page+pdf+free+download, is the primary IOC. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on Shopify. No scripts were extracted from this sample, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient to classify the attack pattern.

Heuristics 3

  • 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.
  • 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=ignou+assignment+front+page+pdf+free+download
    • http://files.perhappened.com/uploads/1/3/1/1/131164153/tekidimuvani_bafasajo_tetuvukoweni.pdf
    • http://files.corneliahoogland.com/uploads/1/3/1/4/131452799/9403076.pdf
    • http://files.yuocreations.com/uploads/1/3/1/8/131856331/572bc13a7e.pdf
    • http://files.preecelightning.com/uploads/1/3/0/9/130969190/a2546e4.pdf
    • http://files.itsjust700.com/uploads/1/3/0/7/130775970/fa1000a7.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/xavamelesifomepegasubik.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/lowes_springfield_il.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/wigetewowaginurotit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/67874397201.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/nojeruzoxepotodisez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/50342555184.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/pebedukobekurigitejefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/android_game_hacking_tool.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/79958541560.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/nefinar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6732/files/nilujunaronozepefutixup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/14305868295.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_off000065e4.bin
3f8725592ae1b7dd01f5e6c8d3ab04646495d10f2850542ef623c788c649a829
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5272 bytes
font_01_sfnt_off000077cd.bin
763bf0abad5a73c376745554a33806f501dcc3fdfda62a56a9f37883971fd76b
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 9900 bytes
font_02_sfnt_off000099b0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x99B0 4324 bytes