Malicious PDF — malware analysis report

Static analysis result for SHA-256 858a1278326dd6ca…

MALICIOUS

PDF

32.9 KB Created: 2020-08-13 00:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5394dd78097963d15b088eb5413341f0 SHA-1: a2bd7a0709b852bdd02d027cda5c00d79e783a45 SHA-256: 858a1278326dd6ca9f2437d941535cb7cd087858743d7f45b19a69eeb85a50f8
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body and heuristics indicate a link farm strategy, attempting to disguise malicious links as legitimate PDF downloads. The primary malicious IOC is the ttraff.com redirector, which likely leads to a phishing page or malware download.

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.com/pify?keyword=new+headway+beginner+student+s+book+second+edition+pdf
    • http://files.kellyskylefiles.com/uploads/1/3/1/4/131453146/xebuw.pdf
    • http://files.thebathhouseco.com/uploads/1/3/2/7/132740598/gurogow.pdf
    • http://files.steeplechasemusic.com/uploads/1/3/1/6/131637553/995fabbf2.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/vokug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/vawedet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/download_netflix_movies_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/prentice_hall_biology_book_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5736/files/70467145132.pdf
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/ajaya_rise_of_kali.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0452/7492/3169/files/structure_of_amylose_and_amylopectin.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/31153351184.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/59744643278.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_off0000432b.bin
9da229201a642c588cb7633a117a9ab724d7c4ec7b1481ffed15e58c282761ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x432B 5752 bytes
font_01_sfnt_off000056d2.bin
0635e4eee6a7f34aaa5719209ea6cef420e6bacc29382d366799d09dbc325c7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D2 9304 bytes

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