Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a8e803a19245d4…

MALICIOUS

PDF

47.4 KB Created: 2020-07-30 23:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de4f0f5c0998dbf76b2cd3420363ef6 SHA-1: 90fe9686b8eb98faf3ffaf9606b5f698d86d46b3 SHA-256: f6a8e803a19245d4172450da63a796c9ee87f2375038fa495863b457437c4e35
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'back exercises at home pdf', suggesting a lure. The primary intent appears to be redirecting the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=back+exercises+at+home+pdf
    • http://files.inharmonyliving.org/uploads/1/3/0/7/130739783/gasabol.pdf
    • http://files.motoworxiow.com/uploads/1/3/0/9/130969809/7564506.pdf
    • http://files.lanternaconsulting.com/uploads/1/3/2/6/132681517/20f522b.pdf
    • http://files.re-bel.org/uploads/1/3/1/1/131164424/mipinuraw-ritofijojer-loladosasobak-redur.pdf
    • http://files.inharmony
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/43053350012.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/suxunegub.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/favufanidedamefokapajenas.pdf
    • https://cdn.shopify.com/s/files/1/0432/5572/6238/files/pomitomin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/95084460079.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/75757527872.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/rebevezuvusodinafadebug.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/38256575107.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/43598236774.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/dasenabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/11036186117.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/liregufunag.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/7910659296.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_off00007baf.bin
508676275fac533f7a6be2ae9616e7e732587f37d244950c43ea8e77c846804a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAF 5228 bytes
font_01_sfnt_off00008d79.bin
1a275608147584e314bf262617768994d966bd8e9eace818aadd717650e206cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D79 10244 bytes

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