Malicious PDF — malware analysis report

Static analysis result for SHA-256 88be5ffa2a118614…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 01:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db6432ff025a61066f0f4b45de9238e SHA-1: 628dbf6dfb111f58b4c5abd916f16715dcb88a6a SHA-256: 88be5ffa2a118614943dbf1a676dbd42044ab73a932da61301ee63e43e1e0b78
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is further disguised with a keyword related to 'basic algebra practice pdf'. The document body, though heavily corrupted, also contains this URL and other PDF links, reinforcing the lure. No scripts were extracted, but the primary attack pattern involves social engineering through deceptive links.

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=basic+algebra+practice+pdf
    • http://files.stellabread.com/uploads/1/3/0/7/130739603/752ba8be6bc69.pdf
    • http://files.secondgradesweetiepies.com/uploads/1/3/1/3/131381799/gapafa_rofekofozagajus_duxizemadasi_likiwebibomovep.pdf
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdf
    • http://nudadobu.cannonvalleycivilwarroundtable.org/uploads/1/3/1/4/131438216/3011171.pdf
    • http://files.ljubaavvakumova.com/uploads/1/3/0/7/130776875/movozabamefadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/85679766979.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/3367783399.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/29298305593.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/41223719295.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/tnpsc_monthly_current_affairs_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/menarolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/16110651926.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/logisotewufomumo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/vidibozafodila.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_off00005c05.bin
afb442cfe4665b8cbd531df17f105c504ea12041e73a5d1a9fb809061bb7de07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C05 5512 bytes
font_01_sfnt_off00006ecc.bin
1e0812f9f921000dbcf82d433e08455d7159a889d2855ca1c59e510cfaad0b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECC 13400 bytes

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