Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5633e5504a272d7…

MALICIOUS

PDF

49.8 KB Created: 2020-08-09 01:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e93d8b96905120bca8e46a9b5d2da6e SHA-1: 1af503caa963e5463bedca85e301809c213d36a3 SHA-256: a5633e5504a272d7c2aa757b7c936bfbe4b9753451b261bee9943eec718fdfb9
128 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector at ttraff.com. The document body text, though heavily obfuscated, contains keywords related to accounting and finance, suggesting a lure to disguise the malicious intent. The presence of numerous links, including the malicious redirector, indicates an attempt to lead the user to a compromised or malicious site, likely for further exploitation or credential harvesting.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accounting+and+finance+for+small+business+made+easy+pdf
    • http://tuguneri.gardenlectures.com/uploads/1/3/0/9/130969465/netogemu.pdf
    • http://files.cambridgedance.org/uploads/1/3/1/3/131380440/palikimikowen-denenizatuwa-werororosabu.pdf
    • http://files.onebowdesigns.com/uploads/1/3/2/6/132681971/565840.pdf
    • http://files.luckytransformationcenter.com/uploads/1/3/2/8/132814155/17e3e.pdf
    • http://files.shaynamade.com/uploads/1/3/1/3/131379803/zazajulaberazedeti.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6517/files/vim_set_tab_to_4_spaces.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/hanuman_chalisa_telugu_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/leromorivalo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/lidocaina_como_anestesico_local.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5844/files/kasozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/24639872397.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/ripupowipefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/14820542540.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/jafiwi.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_off0000838b.bin
cd8b270f4e858e62fa3a23a09d55f5e9944a4dce63fd592aa8ccbd1dcfaef6d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x838B 5708 bytes
font_01_sfnt_off000096ea.bin
da15314a97f7cd48a734b4f2fdbc860c4600be904e438ced06d75cab16487f71
pdf-font-stream PDF embedded font (sfnt) at offset 0x96EA 10240 bytes