Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13374f619aa613e…

MALICIOUS

PDF

40.8 KB Created: 2020-07-31 23:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84228b31ec2a39b4607d1627b70e64c0 SHA-1: df345e2ef9dc7bb853359ff00f2d2350cbda66de SHA-256: b13374f619aa613e2c0304ae8b49f317380331c42e76d3bc52d2f4320d1fd1b3
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=form+ss-+8', is flagged as a known malicious redirector. The document body, though partially corrupted, contains text that appears to be a lure related to 'Form ss- 8'. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link.

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=form+ss-+8
    • http://files.africansafariimports.com/uploads/1/3/2/6/132681863/246858.pdf
    • http://files.cherokeecountyelections.com/uploads/1/3/1/1/131164076/2bf67b099d4f10e.pdf
    • http://files.beatrizguzmanvelasquez.com/uploads/1/3/2/6/132695388/nimabejaguto.pdf
    • http://files.splitridgerockies.com/uploads/1/3/1/1/131164473/ba3c3368d206.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/94719592845.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/pazuruxanutifojuzavuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/memarujeji.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/59124320991.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6837/files/37645962628.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/lifufos.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/32841598726.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/kubivukegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/kubeloperidodod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/mutidaxobisajituvajasevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/nuradovanotinidil.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/xiwidatuzalujuretel.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_off000063e4.bin
e79b365012d83f374292f56d514b8502aedd899724935786c9c110e19b140bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E4 4768 bytes
font_01_sfnt_off0000740d.bin
fd446b66f49fb378d9c2fe2af2c0ecd07bff3431c9c52c4c3b476823b9402245		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740D 10184 bytes

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