Malicious PDF — malware analysis report

Static analysis result for SHA-256 90db09e4d39c3a26…

MALICIOUS

PDF

69.8 KB Created: 2020-08-06 05:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1a37a219a64135ee325394f8e09179f SHA-1: 6ffe05883f16e9bebe40621b9037903a693c7316 SHA-256: 90db09e4d39c3a265e2c0593b99f3749bb2bb979d72b0c5ef99c9f2fa6524ea7
152 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the string 'transistor a1015 datasheet pdf', suggesting a lure to disguise the malicious links as technical documentation. The primary intent appears to be redirecting users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=transistor+a1015+datasheet+pdf
    • http://files.exeterthreading.co.uk/uploads/1/3/2/6/132695780/xinonuwotud.pdf
    • http://files.mheine.com/uploads/1/3/2/6/132682976/94ec35cfd0.pdf
    • http://files.forestburgbaptist.org/uploads/1/3/2/6/132695511/xubifixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/97725494601.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/poxivodetanudedotuwelot.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/utau_download_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/1689/6159/files/55397113502.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/repasones.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/53365051252.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/fugegasozepalosuxiralu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4741/8016/files/23971790270.pdf
    • https://cdn.shopify.com/s/files/1/0428/2155/0247/files/varag.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/xeduxeri.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/pefejidosanorali.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f83.bin
452e05f1b5c6017fd591d74cf47fe0f4986d01ad17845400920abf150318b375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F83 19936 bytes
font_01_sfnt_off0000ae9b.bin
45494c4a97f8b05494972a09088f3c18f89ec12190278d8316e90462c1d6ff35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9B 5364 bytes
font_02_sfnt_off0000c0d4.bin
07d476b3e4be9008ea58ce23c46878c8d82a090529e9e2c28cb95233a2d5c760		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D4 15932 bytes
font_03_sfnt_off0000f245.bin
a56c3305eae8c274f9530afc53b94bb11aea5b2e4106fccae25e6adbba8aa2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 16260 bytes

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