Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53bd958581a93cb…

MALICIOUS

PDF

33.6 KB Created: 2020-08-24 02:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1deb0b0be2c99db290b86d3abef8557c SHA-1: a697c83012b2838eec51dce061b2e6f23481e4d5 SHA-256: e53bd958581a93cbabd711804de4d6b4ffaacbf6025bdf9f1280145203f33e85
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector, https://ttraff.com/pify?keyword=gta+vice+city+cleo+cheat+apk, which is likely the primary malicious payload delivery mechanism. The document body, though partially corrupted, also contains this URL and references to game cheats, indicating a lure to entice users to click the malicious link. 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=gta+vice+city+cleo+cheat+apk
    • http://files.stuarts2gabon.com/uploads/1/3/0/9/130969862/tewosuxum-vilotupaparo-wukejujojamudu.pdf
    • http://rovujo.mysje.org/uploads/1/3/2/7/132740267/biguwokep.pdf
    • http://files.onlinerehabilitation.org/uploads/1/3/1/0/131071037/45f7b.pdf
    • http://files.a2rbeatz.com/uploads/1/3/1/4/131454808/wujulapisotofubud.pdf
    • http://roxija.comedyblockpartyent.com/uploads/1/3/1/4/131406082/745209.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/52671732107.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/74723201593.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/30262185704.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/50705140548.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/drte_hansen_altes_land.pdf
    • https://cdn.shopify.com/s/files/1/0451/3382/4154/files/title_report_meaning_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/run_android_apps_on_virtual_machine.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/51266696885.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/lomarapotumarup.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9470/files/minecraft_decoration_mod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/26667108160.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9654/files/3088749231.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/miya_bhai_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/48216604103.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_off00004787.bin
510b08103afff92358bc9a01a7a1da4a09a085a2553e6e7a602b93db6a47e565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4787 5004 bytes
font_01_sfnt_off00005894.bin
9ff3050b31fa71687b08215a05eaa8acf7d43110162d37772e60d0c57b0fb858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 9656 bytes

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