Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb736e957219d23…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 23:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fdc7babdf9f1167e969599b575a8c2b SHA-1: 796b341bbf3af01140a6f43a4693117ff892a63a SHA-256: bbb736e957219d23c84db1a91f722b6fc1f298659ff90a446ea20bbd398ebf36
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=almaty+city+map+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though partially corrupted, contains the lure text 'Almaty city map pdf' and the malicious URL, suggesting the intent is to trick users into clicking through to potentially harmful content. No scripts were extracted, and the primary malicious activity appears to be the redirection to external sites.

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=almaty+city+map+pdf
    • http://fusojuf.westfarleighsportsclub.com/uploads/1/3/0/7/130738993/d89db9.pdf
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdf
    • http://files.backstagenb.com/uploads/1/3/1/4/131438629/nebupemerunav-wuzanokox-patigixer-vibuxidajukax.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4498/files/tujotuset.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/wobutasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/27927429616.pdf
    • https://cdn.shopify.com/s/files/1/0434/4899/1910/files/free_to_word_converter_arabic_support.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8700/files/32999703066.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/major_oceans_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/65128967507.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/sajetakuzan.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/kuvamixiwikomewak.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/92691328675.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1885060089.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1219/files/kazuwepob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/97385755812.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/lubelotise.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_off00006508.bin
cab97f54c9642781a66a8231a8694654e1666fb92d8ee8ed30cce042bfee27e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6508 5120 bytes
font_01_sfnt_off00007672.bin
0bddf0e25a9bb63addea9e6ea6d15a45b5cdc250853a40a4d20145717b3ea147
pdf-font-stream PDF embedded font (sfnt) at offset 0x7672 9980 bytes