Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc2ec696693c85a…

MALICIOUS

PDF

46.4 KB Created: 2020-08-06 01:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25ed33777ca00e1272121d7bb9d28216 SHA-1: 7534e98e6c24d291e1bf696daaf7097a8eab3298 SHA-256: 5bc2ec696693c85a0100366a8d8fc4d5b566bef3adbe505a9b8df76cc6f1df21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a known malicious domain, likely as part of a phishing campaign. The document body and embedded link text suggest a lure related to tax declarations, aiming to trick users into clicking the malicious URL. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=einkommensteuererkl%25C3%25A4rung+2020+anlage+e%25C3%25BCr+pdf
    • http://files.olgabaptist.org/uploads/1/3/0/7/130776407/makotapiv-jozan-jakabiwunabafom-tezejore.pdf
    • http://files.pdbravard.com/uploads/1/3/1/4/131408798/ed461852727.pdf
    • http://files.artbyryanfinley.com/uploads/1/3/0/9/130969306/2658998.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/83228535742.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/kezokuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/zumimisexojiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/42603944266.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/puzepit.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/adventures_of_sherlock_holmes_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/27604968301.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/futirizosoninuvaxom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/85795632036.pdf
    • https://cdn.shopify.com/s/files/1/0432/7102/8896/files/vufuvejulagitotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/ratovakelevaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/50092386664.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659c.bin
1b533d8269dc3291534d51ac9a13905d664bb727a9f1f31d523f259a4b3df7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 5892 bytes
font_01_sfnt_off000078bf.bin
dca4f6316fffc137f9c638cd5c595b30a49f62b256753a262f54faace7a56c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 10776 bytes
font_02_sfnt_off00009c2a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2A 4324 bytes

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