Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2844e0d00aee84…

MALICIOUS

PDF

47.2 KB Created: 2020-08-25 02:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2bfed347006cb0e9b3b70f98a4660b0 SHA-1: a9aa58e0e6339102763feda6157a1adeb7df3e11 SHA-256: ad2844e0d00aee84fc2527e5fadfb814571270b2d18d9a0421a99eefcc42ea7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with many links hosted on cdn.shopify.com, suggesting a broad distribution attempt. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure. The primary attack vector appears to be social engineering via a malicious link embedded within the PDF.

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=media+player+android+code
    • http://famewiv.womenspeakup.org/uploads/1/3/2/6/132681812/lujuxopajitaxomafafo.pdf
    • http://files.barosario.org/uploads/1/3/1/3/131379709/sowewoxavaxe_ridogujubalatin.pdf
    • http://files.ithembafsc.org/uploads/1/3/0/9/130969435/metali-mexamezivomu-baxekasorezoto-raluwitisi.pdf
    • http://losinu.thexhaleclub.com/uploads/1/3/1/4/131482975/fulimavisorixel-nenoropuwixoxu-kenafo-lidexiv.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/arizona_form_5000a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/vumixikezufenavanubedi.pdf
    • https://cdn.shopify.com/s/files/1/0448/2046/3776/files/web_to_converter_addon_for_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/china_military_power_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0460/3546/8452/files/vopigokugarovov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3025/files/redadiwajiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/21145663481.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/vuzupilalixagujaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/booster_volume_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/voxep.pdf
    • https://cdn.shopify.com/s/files/1/0454/8660/4438/files/activesheet._pastespecial_values_vba.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1143/files/8401139875.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/absalom_spirit.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_off0000795c.bin
f9879915afb0fb86cd0258e30cbed316ae30320f14c816a188dfe047fc36d4ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 4996 bytes
font_01_sfnt_off00008a6e.bin
198f88b595984f8343a820f78b976d6bd06162968eb897deae20f6e41201c027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6E 10864 bytes

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