Malicious PDF — malware analysis report

Static analysis result for SHA-256 41818ba9a692b8e5…

MALICIOUS

PDF

47.7 KB Created: 2020-08-21 21:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73f61dde4651904c4375d17beee365ff SHA-1: 3dbf53529c44efd0e22ea6a656f9b9d2345326a4 SHA-256: 41818ba9a692b8e52938f141c9159c66292d8567dc98305781183e39953e16d5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=android+seekbar+example+programmatically'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on shopify.com. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it is the primary lure. The file's purpose appears to be redirecting users to malicious infrastructure.

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=android+seekbar+example+programmatically
    • http://files.cocoscafe.ca/uploads/1/3/2/6/132695360/4a6ee994252.pdf
    • http://files.gamblefamilyquarterhorses.com/uploads/1/3/2/7/132741110/zojeluvod.pdf
    • http://files.ratusaupdhpe.com/uploads/1/3/0/7/130776245/geraduzu.pdf
    • http://falade.eibenteaching.com/uploads/1/3/2/6/132682974/dujakubatir-rawemeso-sawula.pdf
    • http://files.gracereformedpc.org/uploads/1/3/1/6/131606844/sivuvikirof-jurivizibuder-wabemamifup-gigarixomosa.pdf
    • http://files.gracereformedpc.org/uploads/1/3/1/6/131606844/sivuvikirof-jurivizibuder-wabemamifup-gigarixom
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/97442072986.pdf
    • https://cdn.shopify.com/s/files/1/0428/2597/3916/files/18659274053.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/kexejufugabibolozefib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/lovalebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/rawuzulajikafoxifoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/56786323055.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/sedizawemupugibakekotasob.pdf
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/mofidexumisujapiwow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/capital_account_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/43669448025.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/objections_jeb_blount.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/jixinemadefipoxajamagofo.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_off000070f8.bin
6fd34cb6ddee0e6f851d2a481a02e545bbb74625dd48f1a9c63672d681d99c3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 5756 bytes
font_01_sfnt_off0000847e.bin
7aaf78fc5619743d2cb7344ed18c7281fc1a2897451cc5d074832185dfa2ef35
pdf-font-stream PDF embedded font (sfnt) at offset 0x847E 13916 bytes