Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f479125bc5037d…

MALICIOUS

PDF

54.9 KB Created: 2020-08-17 16:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cae1286b5f69feed4f4f7f12ed4ba857 SHA-1: 0d8bd5326bc7af3dabaaf9b648d614397ba441e5 SHA-256: a5f479125bc5037d4f7bd7a67d133f82cfc4032228357cd4a2087107de1a3ca7
152 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 pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on shopify.com, but some pointing to potentially malicious domains. The document body contains the URL https://ttraff.com/pify?keyword=ansi+b16+5+free, which is likely intended to lure the user into clicking and being redirected 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=ansi+b16+5+free
    • http://latileb.carpetcleanoahu.com/uploads/1/3/1/6/131607575/2f1e94ddb.pdf
    • http://files.zsofia-opraszabo.com/uploads/1/3/0/9/130969926/peginakexunopobirut.pdf
    • http://ravepad.thegardenchild.com/uploads/1/3/1/8/131871674/1629284.pdf
    • http://dokib.831.delivery/uploads/1/3/0/8/130874482/90732ae853fbf7b.pdf
    • http://files.fumcv.org/uploads/1/3/2/6/132683135/4590064.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/mixawap.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/82830832722.pdf
    • https://cdn.shopify.com/s/files/1/0432/0110/1985/files/zogoroposikoxedebadoro.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/zapaxuweduvezedodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/fl_studio_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0448/2852/4701/files/art_electronics.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/midowepo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9933/0462/files/ryanair_boarding_pass_smartphone.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/44187413437.pdf
    • https://cdn.shopify.com/s/files/1/0436/4170/0505/files/44014691603.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/gasezilokutematorosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/49127940501.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_off000074a0.bin
cc9f218fdc25ba9e888d69ed94e9ccc897173172978a2e561b7887ce8d72f905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A0 4976 bytes
font_01_sfnt_off000085a3.bin
d72325fd6731548a73405fd70dbfe30c293335d4dca375adc036caca29593404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A3 16836 bytes
font_02_sfnt_off0000ba17.bin
ddba3217f58172b9153fa2e17a6755d454371157efde6935f0723efb148e6ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA17 16068 bytes

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