Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68523654e9708c3…

MALICIOUS

PDF

49.5 KB Created: 2020-08-20 20:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1bbb7e7ce5b408f209240ff8f2a2c21 SHA-1: 7fdf0710956c019a48a52b3b86de7c742e12dd92 SHA-256: c68523654e9708c35917abed595be690f2f3adf62e4e98b55da967002f8fb84d
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily corrupted, appears to be a lure for an IKEA assembly guide, which is then redirected to the malicious URL. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=ikea+pax+assembly+guide
    • http://files.valeriecizek.com/uploads/1/3/0/9/130969057/meterusub.pdf
    • http://files.speakdownbarriers.org/uploads/1/3/1/3/131381109/33a19f69c1022.pdf
    • http://files.marathondelimd.com/uploads/1/3/1/1/131164555/vudusuwupudab-xaximojikenawan.pdf
    • http://gabozib.sarahinscience.com/uploads/1/3/2/6/132696067/vojowemira_gopufigulowis_fulirawiro_magimeke.pdf
    • http://files.limousinesdallas.net/uploads/1/3/2/7/132712333/rusujesogujazorupem.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/winejopewoferida.pdf
    • https://cdn.shopify.com/s/files/1/0435/3828/4696/files/html_to_open_source.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/jamexoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/vinogutabirelitaxevoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/39904007071.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/11725506375.pdf
    • https://cdn.shopify.com/s/files/1/0431/4736/2453/files/gta_iv_cheat_codes_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0437/3849/7185/files/46071330412.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/74824140064.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/free_residential_house_lease_agreement_form.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_off000079dd.bin
f1383d7cd59a6739427f7596f1165603adacbacc8f657d4e156367611f565abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DD 2828 bytes
font_01_sfnt_off000083e6.bin
f6e219b76cebd60f81fcaa7f139e0217960028f3b685ca8f4932be8610ca4557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E6 5492 bytes
font_02_sfnt_off00009685.bin
8dd619666d74cf234056a1013e7ac680e011d604e76e7572693230e214b8e01d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9685 10124 bytes

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