Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46fdfe050794473…

MALICIOUS

PDF

43.8 KB Created: 2020-08-13 14:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f151c741219d178f0d2ad68c65c95ca3 SHA-1: 42ab814b8443532038eee0a91430291d8ba4c46e SHA-256: c46fdfe050794473f26be0b43197236c1d2beb85f521d2bd22256beef2fdc320
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.ru/pify?keyword=caballo+de+troya+5+cesarea+pdf+gratis, which is flagged as malicious. The document body, though partially obfuscated, contains text related to 'Caballo de troya' (Trojan horse) and references the malicious URL, suggesting a social engineering lure to download further malicious content.

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=caballo+de+troya+5+cesarea+pdf+gratis
    • http://jodanam.themahaffeyagency.com/uploads/1/3/1/6/131636725/zefikagepaj_jerefexeje_nilewepato.pdf
    • http://files.emboldenfestival.com/uploads/1/3/0/9/130969204/8240892.pdf
    • http://files.gboromassage.com/uploads/1/3/1/0/131071243/5bf0b5cfb7fc48f.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/breviario_del_caos_albert_caraco.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/cancionero_cristiano_evangelico_con_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/physics_for_scientists_and_engineers_serway.pdf
    • https://cdn.shopify.com/s/files/1/0438/4591/0678/files/38581950666.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/snap_on_floor_jack.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/89949604064.pdf
    • https://cdn.shopify.com/s/files/1/0445/5071/7604/files/speak_english_fluently_in_10_days.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/samabutikoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/lojemuzisowepafifupuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/les_bases_de_l_agronomie.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4716/files/calendario_festivos_colombia_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/james_stewart_calculus_download.pdf
    • https://cdn.shopify.com/s/files/1/0450/5419/7910/files/stay_hungry_stay_foolish_marathi.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_off00005c12.bin
39a42a20c9764b106cce0e02028c52169db58f087e6d2f55f8da8a7da35326e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C12 5392 bytes
font_01_sfnt_off00006e88.bin
25ea16ed7683723e1c0668858e3bdc35f8dd38b4a61992d4205bd7985bf5afb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 10912 bytes
font_02_sfnt_off0000923f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923F 4324 bytes

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