Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec61f77abf44b21b…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 17:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6adbac5aed2e8ded4b7905b3958584af SHA-1: a944572b937b8e10b18c859046e9c3f4c5c71a28 SHA-256: ec61f77abf44b21bd0e72172d12146cf5522b0c3cb3241b5f4f81ea8b1c13702
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious URL. This indicates a social engineering attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing. The document body itself is largely garbled but contains the title 'Acidimetry and alkalimetry titration in non aqueous titration pdf' and the malicious redirector URL, reinforcing the lure.

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=acidimetry+and+alkalimetry+titration+in+non+aqueous+titration+pdf
    • http://files.mollymcdavittcounseling.com/uploads/1/3/1/3/131398479/5997011.pdf
    • http://files.myentouragemusic.com/uploads/1/3/0/7/130776346/tabaxunolux-kobetosererig-nuzivinaken.pdf
    • http://files.toowoombakoalarescue.org/uploads/1/3/1/4/131438563/5bf7a52f4d.pdf
    • http://files.chattaction.org/uploads/1/3/0/7/130775027/wedurixivib_bumumon_vibilamed_devatipo.pdf
    • http://files.vistadellagofootball.com/uploads/1/3/1/4/131452733/5314567.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/44302543643.pdf
    • https://cdn.shopify.com/s/files/1/0429/7906/6009/files/17464237678.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/47144166042.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/79357380505.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/54622314884.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/zekuvirojiboz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/8560916389.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/91880381650.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81988232477.pdf
    • https://cdn.shopify.com/s/files/1/0435/1279/1192/files/girl_fucks_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/lijekenifopupadu.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_off000067a2.bin
26cb94f4f2891844d97595e9c9e3237d1dc096e81ec562eba870396997d86822
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 5584 bytes
font_01_sfnt_off00007a8e.bin
afb2450cfd3aa30bffddf1a370c20c910eccbf358b868285fe75159a30239151
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8E 10176 bytes