Malicious PDF — malware analysis report

Static analysis result for SHA-256 3022ea9f24781f4b…

MALICIOUS

PDF

37.4 KB Created: 2020-08-12 09:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e478060243f8fe7e456ac8f1d4930b08 SHA-1: e7dbe1db9e21c0b31bba67f669084f366ebbf173 SHA-256: 3022ea9f24781f4b714c4f1cfe33a26f060631164d740700f3acc14b42cbbee1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be redirecting the user to malicious infrastructure via the 'ttraff.com' URL, likely for further exploitation or phishing.

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=psychology+10th+edition+myers+pdf
    • http://bufox.fam-ilyproducts.com/uploads/1/3/2/6/132680813/vajedovi_majolowulur.pdf
    • http://files.haleydesignillustration.shop/uploads/1/3/0/7/130775904/koridodebotuf-pizonotabeg.pdf
    • http://files.ittstrading.com/uploads/1/3/1/1/131163635/d2559ed6903.pdf
    • http://files.formulastudentusa.com/uploads/1/3/1/3/131398244/9135371.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/crosley_refrigerator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/dolit.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/98370695882.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/bending_moment_shear_force_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/52805267582.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/79959845821.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0770/files/zamzar_convert_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0436/8770/6777/files/bronchiolite_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3696/6055/files/45096429957.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/lakaborog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045a1.bin
e559261195ea0308851cc2727b798a0a28f28c912de2ee9828cdf39c212e0665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45A1 5444 bytes
font_01_sfnt_off000057f2.bin
e30291cb3528b1f803a8564e462d9e5a8fbf79d15d13a8f556eb2e4a51940daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F2 10200 bytes
font_02_sfnt_off00007aad.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 4324 bytes

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