Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1733275ae241f5…

MALICIOUS

PDF

48.3 KB Created: 2020-08-23 20:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b707c4d25bd3c91b492d28b12c4a824f SHA-1: f0a68fae49f5f285cc0463703baa429967a46a58 SHA-256: 2a1733275ae241f511f3bf4164e311a8068ee1cb1d0c01f11879d31c4416df3d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Amplificatore operazionale 741 datasheet' and includes the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm used for SEO poisoning or distributing malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=amplificatore+operazionale+741+datasheet
    • http://files.cisairandheat.com/uploads/1/3/2/6/132682030/losowiboxajoti-wenojuzobubo-vuxur.pdf
    • http://files.sterritup.com/uploads/1/3/1/4/131406303/memepeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/21877515322.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaragevutaxesidep.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7456/files/47341054091.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/the_austronesian_languages_of_asia_and_madagascar.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/definisi_cacar_air.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/44242034464.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/briggs_and_stratton_engine_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1111/files/61552158912.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/lafirilof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/pedadogotisixojoteletisa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2359/files/xewapedifawisiruzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/vinazufosenoba.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/fubixet.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fbe.bin
e6d10c6e02c5a25e8a11da09d2cb191a0394acb8b1ac6e0a3f6ee5072a6544c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 5656 bytes
font_01_sfnt_off000072d9.bin
85ebdf526340601331f9b8f139ec9ef6977edc6efad168e2d1f6dcede490cb72
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 14036 bytes
font_02_sfnt_off00009e70.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E70 16204 bytes