Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9154e0259941dbc…

MALICIOUS

PDF

117.4 KB Created: 2020-08-15 02:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8332575bc2d8e4c5aca465ae290018d3 SHA-1: 7541a7febd23b697938dfa2d4a031c2f66239bd8 SHA-256: a9154e0259941dbc6c2435d7fd80be58764885e7f8993edf0c6907df5d2e089e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=samsung+company+introduction+pdf'. This URL is presented within the document body, disguised as a Samsung company introduction. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm used for SEO poisoning or to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document and a malicious URL.

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=samsung+company+introduction+pdf
    • http://files.prescottband.com/uploads/1/3/0/8/130814058/4386749076.pdf
    • http://lixeregu.staceymason.com/uploads/1/3/1/6/131637814/8b054e96e6.pdf
    • http://files.jpgallagher.co.uk/uploads/1/3/2/3/132302819/rigixafolekoruj-roduridobiwupe.pdf
    • http://files.greensboroacrepair.com/uploads/1/3/1/8/131858540/duxizomifawoxojigub.pdf
    • http://kawumexep.stayblooming.com/uploads/1/3/1/6/131637814/rizuduwimupeseb-wivavoxem.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/kudenesuxotuxese.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/62839886251.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/multilingualism_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/gogufujosigozunatojerano.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/66460529939.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/5232346204.pdf
    • https://cdn.shopify.com/s/files/1/0453/9786/8712/files/north_america_political_map.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001377d.bin
b2115ebe023ff290982013cfc58cd1b097b37a5f77f6c346fc304b7cbe98194e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1377D 16108 bytes
font_01_sfnt_off00016aae.bin
c5bb171862297d758c17e1845c84a9a39290b7f22203508653f66bc78c92a39e
pdf-font-stream PDF embedded font (sfnt) at offset 0x16AAE 5412 bytes
font_02_sfnt_off00017cf5.bin
d77d6e5f6e7bb6c06efc41726a0d342547ce3db8737174102efd2d2bc45f7722
pdf-font-stream PDF embedded font (sfnt) at offset 0x17CF5 11460 bytes
font_03_sfnt_off0001a41d.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A41D 16120 bytes
font_04_sfnt_off0001b904.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B904 4324 bytes