Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c799402af4c49c4…

MALICIOUS

PDF

46.0 KB Created: 2020-08-08 14:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 153728fa0389f45de53818683f26f149 SHA-1: 3062dc6a488e0b67a7b224232ca732b24f93bd05 SHA-256: 1c799402af4c49c433c37b83799b026eafc6fa0df1be56e146f2bbe8799302fd
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution

The PDF contains a lure for 'networking multiple choice questions and answers' and embeds numerous links. One primary link directs to a known malicious redirector, and the document body explicitly requests sensitive information such as recovery phrases and private keys. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly. No scripts were extracted from this sample.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=networking+multiple+choice+questions+and+answers+pdf
    • http://files.sallyshaw.com.au/uploads/1/3/0/7/130739916/b7df74ff4a9.pdf
    • http://matowepul.soundofsilver.net/uploads/1/3/1/1/131164250/wekuv_xizalemeg_pogugunuxada.pdf
    • http://files.flexgridtech.com/uploads/1/3/2/7/132740723/fuzodemevuvili.pdf
    • http://files.realestatestuff.net/uploads/1/3/1/4/131438641/f4986b0d.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/tixejuxuzifesazulax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/aboriginal_food_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/bafekagakejenewoxisir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/fobexunutijetuloxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/minecraft_1._5._2_mods.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/3368843045.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/3d_converter_navisworks.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/degowirapor.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/garukoresiluzujumujapuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/equilibrio_quimico.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/36888605900.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/11647433133.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.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_off00007435.bin
8462ce2b49e6ebb3090bed07aeaaec7b37c44ff9df3a2fb8e17275b5127dc911
pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 5820 bytes
font_01_sfnt_off000087f3.bin
7d89e445f16620c5c2f7f0a6bbdfdb1595c0f5c963a2fb300ee8e33211887e42
pdf-font-stream PDF embedded font (sfnt) at offset 0x87F3 10248 bytes